Choose the correct statement for amplitude modulation: (a) Amplitude of modulating is varied in ...

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Choose the correct statement for amplitude modulation:
(a) Amplitude of modulating is varied in accordance with the information signal.
(b) Amplitude of modulated is varied in accordance with the information signal.
(c) Amplitude of carrier signal is varried in accordance with the information signal
(d) Amplitude of modulated is varied in accordance with the modulating signal.
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