Explanation:

- Option 1: Odisha

- Odisha is the leading producer of manganese in India. It has rich deposits and the majority of the country's reserves.

- The state contributes a significant portion of India's total manganese production.

- Correct Answer

- Option 2: Chhattisgarh

- Chhattisgarh has manganese deposits, but they are considerably less than those in Odisha.

- Option 3: Bihar

- Bihar does not have substantial manganese reserves.

- Option 4: Maharashtra

- Maharashtra has a fair share of manganese production but ranks below Odisha.