What happens to the primary member in a MongoDB Server Cluster during the NDB patching process?

What happens to the primary member in a MongoDB Server Cluster during the NDB patching process?
A . It is patched last and is restored to its original state.
B . It becomes a read-only member during the patching process.
C . It is skipped during the patching process to ensure no downtime.
D . It is patched first and then becomes a secondary member.

View Answer

Answer: A