Option 1: Jharkhand, Chhattisgarh, Odisha, West Bengal

Option 2: Jharkhand, Odisha, Chhattisgarh, West Bengal

Option 3: Odisha, West Bengal, Jharkhand, Chhattisgarh

Option 4: Odisha, Chhattisgarh, West Bengal, Jharkhand

The question is asking for the correct sequence of proved coal reserves in Indian states in decreasing order. The correct answer is option 2, which states that the correct sequence is Jharkhand, Odisha, Chhattisgarh, and West Bengal.

In option 1, the sequence is Jharkhand, Chhattisgarh, Odisha, and West Bengal. This contradicts the correct sequence stated in the answer.

In option 3, the sequence is Odisha, West Bengal, Jharkhand, and Chhattisgarh. This is also incorrect.

In option 4, the sequence is Odisha, Chhattisgarh, West Bengal, and Jharkhand. This contradicts the correct sequence stated in the answer.

Therefore, option 2 is the correct answer according to the provided information.