what 22 MHz channels are considered non-overlapping?

In an 802.11 2.4 GHz system, what 22 MHz channels are considered non-overlapping? (Choose
2)

A.
Channels 5 and 10

B.
Channels 1 and 5

C.
Channels 3 and 7

D.
Channels 2 and 8

E.
Channels 8 and 11

F.
Channels 10 and 13