Which of the following statement is wrong?

Options

A. Ground wave propagation can be sustained at frequncies 500 kHz to 1500 kHz
B. Satellite communication is useful for the frquencies above 30 MHz
C. Sky wave propagation is useful in the range of 30 to 40 MHz
D. space wave propagation takes place through tropospheric space

Explanation

Sky wave propagation is possible for the radiowaves of frequency range from 2 MHz to 30 MHz and not in the range 30 to 40 MHz.