Explanation:

- Commercial Banks:

- They play a significant role in providing loans for agricultural purposes.

- They have extensive reach with numerous branches across India.

- They have the highest share in credit disbursement for agriculture.

- Cooperative Banks:

- They support farmers mainly in rural and semi-urban areas.

- They serve local communities and have a smaller credit share than commercial banks.

- Regional Rural Banks:

- They focus on serving the rural population but have limited reach.

- Their share is less compared to commercial banks.

- Microfinance Institutions:

- They provide small loans to low-income individuals.

- Their role in agriculture credit is minor compared to others.

. The correct answer is Option 3: Commercial Banks.