Which two statements are true about port groups and VLANs? (Choose Two)
Only one VLAN can be specified in a port group.
The same VLAN cannot be specified in multiple port groups.
Multiple port groups can specify the same VLAN.
Multiple VLANs can be specified in a port group.
Mastering Vmware vSphere, page 162.
A port group can be associated with only one VLAN at a time. [A above]
The screen shot below shows two port groups with the same VLAN. [C above]