Final answer:
The correct answer is D.Oracle Clusterware being down on the VM cluster is NOT a prerequisite for patching Grid Infrastructure or database homes.
Step-by-step explanation:
The correct answer is D. All database compute nodes of the VM cluster are up and running. This is not a prerequisite for patching Grid Infrastructure or database homes using the console. A prerequisite for patching is that the Oracle Clusterware is up and running, which is the contrary of option B. Options A and C are also prerequisites. Option A states that the /u01 directory on the database host file system must have at least 15 GB of free space for the execution of Patching processes. Option C states that the required patch should be available on the Control Plane server.
The prerequisite that is NOT required for patching Grid Infrastructure or database homes using the console is B. Oracle Clusterware is down on the VM cluster. Typically, during patching processes, it's important that Oracle Clusterware and other related services are running to ensure a smooth and coherent patch application. The /u01 directory needs sufficient space (15 GB free space) for patch operations, the patch should be available on the Control Plane server, and all database compute nodes should be operational to verify the patch compatibility and successful application across the VM cluster.