A device mounted on a communication satellite which receives, amplifies and re-transmits signals from earth station is

The correct answer is: B. Transponder

A transponder is a device that receives a signal and then retransmits it, often after amplifying it or changing its frequency. In the context of communication satellites, a transponder receives a signal from an earth station, amplifies it, and then retransmits it back to Earth.

The other options are incorrect.

• A track is a path that
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