Read statements (A) and (B) and choose appropriate option from the answer options:
A. Megasthenes mentions seven castes into which the Indian society was divided.
B. Megasthenes confused castes with professions.
1. Both (A) and (B) are true, and (B) is the correct explanation of (A).
2. Both (A) and (B) are true, but (B) is not the correct explanation of (A).
3. (A) is true, but (B) is false.
4. (A) is false, but (B) is true.