A speech signal of \( 3 \mathrm{kHz} \) is used to modulate a carri...

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A speech signal of \( 3 \mathrm{kHz} \) is used to modulate a carrier signal of frequency \( 1 \mathrm{MHz} \), using amplitude modulation. The frequencies of the side bands will be
(a) \( 1.003 \mathrm{MHz} \) and \( 2.997 \mathrm{MHz} \)
(b) \( 3001 \mathrm{kHz} \) and \( 2997 \mathrm{kHz} \)
(c) \( 1003 \mathrm{kHz} \) and \( 1000 \mathrm{kHz} \)
(d) \( 1 \mathrm{MHz} \) and \( 0.997 \mathrm{MHz} \)
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