According to ISO/IEC 27001:2022, which specifies the requirements for establishing, implementing, maintaining and continually improving an information security management system (ISMS), clause 5.2 requires top management to establish an information security policy that provides the framework for setting information security objectives1. Clause 6.2 requires top management to ensure that the information security objectives are established at relevant functions and levels1. Therefore, when verifying that the information security policy and objectives have been established by top management, an ISMS auditor should review relevant documents and records that demonstrate top management's involvement and commitment.
To verify that the mobile device policy and objectives are implemented and effective, an ISMS auditor should review relevant documents and records that demonstrate how the policy and objectives are communicated, monitored, measured, analyzed, and evaluated. The auditor should also sample and verify the implementation of the controls that are stated in the policy.
Three options for the audit trail that are relevant to verifying the mobile device policy and objectives are:
* Review the internal audit report to make sure the IT department has been audited: This option is relevant because it can provide evidence of how the IT department, which is responsible for managing the mobile devices and their security, has been evaluated for its conformity and effectiveness in implementing the mobile device policy and objectives. The internal audit report can also reveal any nonconformities, corrective actions, or opportunities for improvement related to the mobile device policy and objectives.
* Sampling some mobile devices from on-duty medical staff and validate the mobile device information with the asset register: This option is relevant because it can provide evidence of how the mobile devices that are used by the medical staff, who are involved in processing and storing residents' data, are registered in the asset register and have physical protection enabled. This can verify the implementation and effectiveness of two of the controls that are stated in the mobile device policy.
* Review the asset register to make sure all company's mobile devices are registered: This option is relevant because it can provide evidence of how the company's mobile devices that are within the ISMS scope are identified and accounted for. This can verify the implementation and effectiveness of one of the controls that are stated in the mobile device policy.
The other options for the audit trail are not relevant to verifying the mobile device policy and objectives, as they are not related to the policy or objectives or their implementation or effectiveness. For example:
* Interview the reception personnel to make sure all visitor and employee bags are checked before entering the nursing home: This option is not relevant because it does not provide evidence of how the mobile device policy and objectives are implemented or effective. It may be related to another policy or objective regarding physical security or access control, but not specifically to mobile devices.
* Review visitors' register book to make sure no visitor can have their personal mobile phone in the nursing home: This option is not relevant because it does not provide evidence of how the mobile device policy and objectives are implemented or effective. It may be related to another policy or objective regarding information security awareness or compliance, but not specifically to mobile devices.
* Interview the supplier of the devices to make sure they are aware of the ISMS policy: This option is not relevant because it does not provide evidence of how the mobile device policy and objectives are implemented or effective. It may be related to another policy or objective regarding information security within supplier relationships, but not specifically to mobile devices.
* Interview top management to verify their involvement in establishing the information security policy and the information security objectives: This option is not relevant because it does not provide evidence of how the mobile device policy and objectives are implemented or effective. It may be related to verifying that the information security policy and objectives have been established by top management, but not specifically to mobile devices.
References: ISO/IEC 27001:2022 - Information technology - Security techniques - Information security management systems - Requirements

The immediate consequence is suspension of certification, making option A correct. ISO/IEC 17021-1 clearly states that certified organizations must allow scheduled surveillance audits to verify continued conformity with the standard. Surveillance audits are mandatory and form part of the three-year certification cycle.
Refusing or failing to undergo a surveillance audit prevents the certification body from confirming that the ISMS remains effective and compliant. This creates a loss of confidence in the validity of the certification. As a result, certification bodies are required to suspend certification until the audit can be conducted and conformity re-established.
Option B is incorrect because certification validity is conditional upon ongoing surveillance. Certification does not remain valid if mandatory audits are refused. Option C is incorrect because transferring certification does not remove the obligation to undergo surveillance audits; a transfer would still require evidence of conformity and audit continuity.
Suspension is a protective mechanism to ensure that ISO/IEC 27001 certificates remain credible and trustworthy. If the organization later agrees to the audit and resolves issues, the certification may be reinstated. Therefore, refusal to undergo a surveillance audit leads to immediate suspension.

Explanation (ISO-aligned)
* Vulnerability scanning tools may produce false positives.
* ISO/IEC 27002:2022 A.8.8 (Management of technical vulnerabilities) requires vulnerabilities to be evaluated, not blindly accepted.
* A vulnerability becomes confirmed only after validation, contextual analysis, or successful exploitation.
Option A is incorrect because scan results require validation.
Option B is incorrect because failure to exploit does not prove absence of vulnerability.
# Correct reasoning: risk must be validated before confirmation.

Comprehensive and Detailed In-Depth Explanation:
* A. Correct Answer:
* ISO/IEC 17021-1 allows extension audits to be conducted alongside surveillance audits.
* This reduces redundancy and cost while maintaining compliance.
* B. Incorrect:
* Certification bodies have the authority to approve extension audits.
* C. Incorrect:
* Extensions are not restricted to the second year-they can occur at any time during the certification cycle.
Relevant Standard Reference:
* ISO/IEC 17021-1:2015 Clause 9.6.5 (Extension Audits During Surveillance)

The Act phase of the PDCA cycle is where the organisation takes actions to improve its processes and performance based on the results of the Check phase. This may involve resetting objectives to make them more realistic, achievable or challenging, or implementing changes to address the root causes of problems and achieve the desired outcomes. The Act phase is also where the organisation monitors the effects of the actions taken and evaluates their effectiveness and efficiency. The Act phase is important because it enables the organisation to learn from its experience and continually improve its ISMS. References: What is 'Plan, Do, Check, Act'? A framework for continuous improvement, PDCA in ISO27001 - Free guide to learn | Dr. Erdal Ozkaya, PECB Candidate Handbook ISO 27001 Lead Auditor (page 12)