Distance between points= 48000 km = 48 $\times 10^{6}$ meter
Propagation speed = 2.4 $\times 10^{8}$ meter / sec.
Propagation Time = $\frac{Distance\ between\ points}{Propgation \ speed}$
= $\frac{48 \times 10^{6}}{2.4 \times 10^{8}}=0.2 sec $
= 200 ms
Hence,Option(D) 200 ms.