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Which of the following is used for demodulation of PAM signal?

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Which of the following is used for demodulation of PAM signal?

(a) a band reject filter

(b) a band pass filter

(c) a low pass filter

(d) a high pass filter

I had been asked this question by my school principal while I was bunking the class.

Question is from Generation of VSB topic in chapter SSB Modulation of Analog Communications

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Right choice is (c) a low pass filter

The best I can explain: Pulse Amplitude Modulation is the transmission of data by varying the amplitude of different pulses. A low pass filter is always used to demodulate a PAM as it attenuates high frequencies and allows only low frequencies to pass.

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