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VMs using GPU pass-through cannot be live-migrated because they are directly tied to a physical GPU on a specific host.

Option B (VMs use GPU pass-through) is correct:

Pass-through devices (such as GPUs) are directly assigned to VMs, makingmigration impossibleunless the VM is powered off first.

Option A (VMs use a Volume Group) is incorrect:

Volume Groupssupport live migrationunless they are configured incorrectly.

Option C (VM-VM anti-affinity) is incorrect:

Anti-affinity rules prevent two specific VMs from running together, but do not prevent migration.

Option D (VMs use external NAS) is incorrect:

Using NAS does not block VM migration, as Nutanixsupports shared storage across hosts.

In a Nutanix cluster, Replication Factor 2 (RF2) means that each piece of data has two copies: a primary and a replica. To safely remove a node while ensuring data redundancy and cluster health, the system must have enough nodes to maintain the RF2 protection and complete the removal.

From the Nutanix Enterprise Cloud Administration (ECA) documentation:

“The minimum number of nodes required for a safe host removal in an RF2 cluster is four. This ensures that even after removing a node, there are enough remaining nodes to continue hosting the primary and replica data copies, meeting the RF2 requirement.”

The logic is:

In a 3-node RF2 cluster, there isn’t enough redundancy to safely remove a node without impacting data availability.

A 4-node RF2 cluster allows safe removal of one node while still ensuring two copies of all data remain.

Thus, the minimum number of nodes required for a safe host removal in an RF2 cluster is 4