802.11b protocol defines 14 channels in the 2.4GHz frequency band, and adjacent channels overlap in the spectrum. In order to maximize the use of frequency band resources, which of the following sets of channels can be used for wireless coverage?

802.11b protocol defines 14 channels in the 2.4GHz frequency band, and adjacent channels overlap in the spectrum. In order to maximize the use of frequency band resources, which of the following sets of channels can be used for wireless coverage?
A . 1, 5, 9
B . 1, 6, 11
C . 2, 6, 10
D . 3, 6, 9

Answer: B