Which version of Cisco Nexus Operating System became a common operating system for Cisco Nexus switches and Cisco MDS storage switches?

Which version of Cisco Nexus Operating System became a common operating system for Cisco
Nexus switches and Cisco MDS storage switches?

A.
2.7

B.
3.3

C.
3.9

D.
4.1

E.
5.01GD

F.
6.2

Explanation:
“While many of the changes leading to convergence are product releases and features, others are
more symbolic. One of these symbolic changes is the rebranding, of Cisco® MDS 9000 SAN-OS

Software as Cisco MDS 9000 NX-OS® Software effective with Release 4.1.”
http://www.cisco.com/en/US/prod/collateral/ps4159/ps6409/ps5989/ps9898/Rebranding_MDS_90
00.html