Microsoft Certified: Azure Fundamentals (AZ-900) Practice Exam

The correct setup that can be deployed as an availability zone is the option that describes two datacenters located in the same region.

Availability zones are unique physical locations within a region that have independent power, cooling, and physical security to protect against datacenter failures. By having datacenters in the same region yet functioning independently, Azure can ensure high availability, redundancy, and disaster recovery capabilities. Deploying resources in different availability zones allows for greater resiliency, as if one zone experiences an outage, the resources in another zone can continue to operate seamlessly.

The other setups listed do not meet the criteria for availability zones. Deploying datacenters in different regions or different geographies refers to Azure's region-to-region redundancy, which is not classified under availability zones. Additionally, having two servers in the same datacenter does not provide the necessary isolation from localized failures that availability zones are designed to address.