Which of the following statements is not true regarding the number of subcarriers in the following channels? (Choose all that apply.)

A. 40 MHz subcarriers = 2 times 20 MHz subcarriers
B. 40 MHz subcarriers > 2 times 20 MHz subcarriers
C. 80 MHz subcarriers = 2 times 40 MHz subcarriers
D. 80 MHz subcarriers > 2 times 40 MHz subcarriers
E. 160 MHz subcarriers = 2 times 80 MHz subcarriers
F. 160 MHz subcarriers > 2 times 80 MHz subcarriers

The statements that are not true regarding the number of subcarriers in various channels are B, D, and F. The number of subcarriers is generally proportional to the bandwidth.

Explanation:

In relation to the number of subcarriers in the various channels, the statements that are not true are B, D, and F. Specifically, these statements suggest that the number of subcarriers in a 40 MHz channel is more than twice that in a 20 MHz channel (B), the number in an 80 MHz channel is more than double that in a 40 MHz channel (D), and the number in a 160 MHz channel is more than double that in an 80 MHz channel (F). These are incorrect because the number of subcarriers is generally proportional to the bandwidth; thus, a 40 MHz channel would have approximately twice as many subcarriers as a 20 MHz channel, not more. Likewise, an 80 MHz channel would have about twice as many subcarriers as a 40 MHZ channel, and a 160 MHz channel would have twice as many as an 80 MHz channel.

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