Assertion : The information contained in our original low frequency baseband signal is to be translated into high or radio frequencies before transmission.
Reason: For transmitting a signal, the antenna should have a size comparable to the wave length of the signal.

Answer

A

Explanation

For transmitting a signal, we need an antenna or an serial. Thus antenna should hav e a size comparable to the wavelength of the signal to the signal. For an electromagentic wave of freqeuncy 20 kHz. The wavelength is 15km. Obviously such a long antenna is not possible to constract and operate Hence direct transmission of such baseband signal is not p ractical. Therefore there is a need of translating the information contained in our original low frequency baseband signal into high or radio frequencies before transmission.