Assertion(A): The effect of water as a factor is more through its effect on the plant, rather than directly on photosynthesis.
Reason(R): Water stress also makes leaves wilt and increases metabolic activity as well.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.