Give the correct answer to the question

Dear Student, A transmitter consists of an oscillator to generate the carrier wave, an amplifier to amplify the signal and a modulator which modulates the signal with the carrier wave. So, assertion is true. A modulator superimposes a low frequency message signal on a high frequency wave, which acts as a carrier by change its amplitude, frequency or phase. This process is known as modulation. So, reason is also true. Modulator is an essential part of a transmitter because modulation decides the frequency range and size of a transmitter, so it is essential. Hence, it is the correct explanation of assertion. Ans (a) Regards