A carrier wave of peak voltage \( 14 \mathrm{~V} \) is used for transmitting a message signal. T...

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A carrier wave of peak voltage \( 14 \mathrm{~V} \) is used for transmitting a message signal. The peak voltage of modulating signal given to achieve a modulation index of \( 80 \% \) will be
(a) \( 11.2 \mathrm{~V} \)
(b) \( 7 \mathrm{~V} \)
(c) \( 22.4 \mathrm{~V} \)
(d) \( 28 \mathrm{~V} \)
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