In the 2.4 GHz spectrum for 802.11, which channels are nonoverlapping?

A. Channels 1, 3, and 11
B. Channels 1, 3, and 6
C. Channels 1, 6, and 11
D. Channels 1 through 6

C. In the 2.4 GHz spectrum for 802.11, there are three non-overlapping channels 1, 6, and 11, each of which is 22 MHz wide. Although channel 14 technically is non-overlapping, it is only allowed in Japan.