Which two statements are true about the 5 GHz frequency?

802.11g uses this frequency

802.11n uses this frequency

It is mostly interference-free

The signal travels the same distance as that of the 2.4 GHz frequency

802.11n uses this frequency

It is mostly interference-free

Explanation:

Among the listed Wi-Fi standards, 802.11n uses the 5 GHz frequency, not 802.11n. And it is true that it is mostly interference free, as interference mostly happens when 2.4 GHz frequency comes across devices that may interfere with the signal, such as microwaves, TVs, etc ... The 5 GHz frequency has bigger bandwidth than 2.4 GHz, but the latter has higher coverage.