You are designing a single-region three-tier application on Azure VMs. The solution must achieve a 99.99% VM uptime SLA and minimize east–west latency between the web, application, and database tiers. The database requires Ultra Disk. What should you design? Choose two.

To achieve a 99.99% VM uptime SLA, deploying two or more VMs per tier across at least two Availability Zones is essential, as this provides redundancy and fault isolation. A zone-redundant Standard Load Balancer distributes traffic and ensures high availability across zones. To minimize east-west latency between frequently communicating VMs, placing them into a Proximity Placement Group in each zone is crucial. This co-locates VMs as close as possible within the data center. Incorrect options: A single Availability Set for all tiers and a single Proximity Placement Group spanning multiple zones would not meet the 99.99% SLA across zones and Proximity Placement Groups cannot span multiple zones. A Basic Load Balancer does not support zone redundancy. Ultra Disk requires specific VM sizes and Write Accelerator is not universally available or sufficient to attach Ultra Disk to any VM size. Placing all tiers in the same subnet does not guarantee the lowest latency compared to Proximity Placement Groups, which specifically optimize for physical proximity.