The bandwidth of the audio signal is

$20 H z$

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$20 K H z$

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$20 M H z$

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$20 G H z$

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Solution

The correct option is B
$20 K H z$

The explanation for the correct option:
In case of option B: $20 K H z$
Speech, as well as music and other sounds, are examples of audio signals.
The audio signal on a compact disc is limited to a maximum frequency of $20 K H z$ .
Each sample is coded in 16 bits and sampled at $44.1 k H z$ .
Hence, option B is the correct answer.

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