question_answer

Consider the following statements

1. Wind speed is influenced by the topographical features.

2. The effect of surface friction extends to a height of about 500m (1650 ft)

3. Rougher surfaces produce more friction.

4. Wind speed changes according to pressure gradient.

Which of the above statements is/are correct?

A) 1 and 2only

B) 1, 2 and 3 only

C) 1, 2, 3 and 4

D) 2, 3 and 4 only