The velocity of sound in air is affected by change in the
1. Moisture content of air.
2. Temperature of air.
3. Composition of air.
4. Atmospheric pressure.
Choose the correct answer.

A. 1, 2 and 3

B. 2, 3 and 4

C. 1, 2 and 4

D. 1, 3 and 4

Answer: Option A