A
1 only
B
2 only
C
Both 1 and 2
D
Neither 1 nor 2
Correct answer: (a) 1 only
Explanation
- A
1 only
1 only. Water vapour is a gas and generally decreases with height.
- B
2 only
2 only. Percentage is maximum in the warm tropics, not at the poles.
- C
Both 1 and 2
Both. Statement 2 fails.
- D
Neither 1 nor 2
Neither. Statement 1 holds.
Summary. Official key is (a) 1 only. Water vapour is a gas. Its amount typically falls with altitude. It is most abundant in warm, humid tropical air, not at the poles. So 2 is false.
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