Explanation:

- Option 1: Nitin Gadkari

- Nitin Gadkari is an Indian politician who has held various ministerial positions, including Minister for Road Transport and Highways.

- Option 2: Radha Mohan Singh

- Radha Mohan Singh is known for his role as the Minister of Agriculture. He has been involved in agricultural reform and rural development programs.

- Option 3: Rajnath Singh

- Rajnath Singh is a senior leader in the Indian government, currently serving as the Defence Minister. He has also served as Home Minister and Chief Minister of Uttar Pradesh.

- Option 4: Nirmala Sitharaman

- Nirmala Sitharaman was the Defence Minister of India until 2019. She inaugurated the Tamil Nadu Defence Industrial Corridor on 20 January 2019.