question_answer

Consider the following statements:

1. Tropo pause extends to a height of 18 km at the equator and only 10 km at the poles.

2. Ionosphere is useful for radio transmission.

Which of the above statements is/are correct?

A)  1 only                         

B)  2 only

C)  Both 1 and 2    

D)  Neither 1 nor 2