Which is NOT a correct igroup configuration?

A.
Two different iQNs placed in different OS-type igroups and mapped to two different LUNs

B.
Two different IQNs placed in an igroup and mapped to a single LUN

C.
A single IQN placed in an igroup and mapped to a single LUN

D.
A single IQN placed in two different OS-type igroups and mapped to a single LUN