In a geostationary satellite communication system, a message signal is transmitted from an earth station via an uplink to a satellite, amplified in a transponder on board the satellite and then transmitted via a downlink to another earth station. The most popular frequency band for satellite communication is

A. 16 MHz for the uplink and 14 MHz for the downlink

B. 4 GHz for the uplink and 6 GHz the downlink

C. 6 GHz for the uplink and 4 GHz for the downlink

D. 10 GHz for the downlink and 8 GHz for the uplink

Answer: Option C