An administrator deploys vCenter Server using the embedded Platform Services Controller.
After testing the deployment for a couple of months, it is determined that the environment would be better served with an external Platform Services Controller.
What should the administrator do to meet this new requirement?
A. Deploy a fresh instance of vCenter Server with an external Platform Services Controller.
B. Perform a fresh install of an external Platform Services Controller.
C. Migrate the embedded Platform Services Controller to an external Platform Services Controller.
D. Upgrade the embedded Platform Services Controller to an external Platform Services Controller.
https://kb.vmware.com/s/article/2148924?lang=en_US
Seems that the answer “D” is correct
The answer is “D”. It is permitted to upgrade the Embedded Platform Services Controller to an External Platform Services Controller in ESXi 6.5. Verify here:
https://wuchikin.wordpress.com/2018/06/20/migrating-from-vcenter-server-embedded-psc-to-external-psc/
I read the link and the first step he does is deploy a new PSC. I think A is the correct.