The signal m(t) as shown is applied both to a phase modulator (with kp as the phase constant) and a frequency modulator with (kf as the frequency constant) having the same carrier frequency. The ratio $$\frac{kp}{kf}$$ $$(in \frac{rad}{Hz})$$ for the same maximum phase deviation is

A

$$8 \pi$$

B

$$4 \pi$$

C

$$2 \pi$$

D

$$ \pi$$