If you need to restore an Azure VM to another availability zone in a secondary region, which option is appropriate?

To restore an Azure VM to another availability zone in a secondary region, the most appropriate option is Cross Zonal Restore. This choice is specifically designed to allow the movement of VMs between different availability zones, which is particularly useful in scenarios where you want to enhance redundancy, maintain availability, or take advantage of different zone features.

Cross Zonal Restore focuses on the intricacies of disaster recovery within the context of Azure's architecture, where availability zones are defined as distinct physical locations within a region. Using this approach ensures that the VM can be effectively restored to a different zone while maintaining the desired configurations, applications, and data integrity.

Considering the context of the other options, Cross Subscription Restore would be related to restoring VMs across different Azure subscriptions but does not specifically address the requirements of restoring to different availability zones. Cross Region Restore would imply a broader scope, restoring to an entirely different region rather than focusing on zonal capabilities within a region. Standard Restore typically involves restoring within the same region and zonal constraints, not addressing the necessity of moving across availability zones effectively.

Therefore, Cross Zonal Restore stands out as the most suitable choice for restoring an Azure VM to another availability zone within a secondary region.