If $E_c$ and $E_m$ are peak values of carrier and modulating signals,respectively,then for $100 \%$ modulation,
- A$E_c = \frac{E_m}{2}$
- B$\frac{E_c^2}{2} = E_m^2$
- C$E_c = E_m$
- D$E_c = 2 E_m$
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