Explanation:

- Verghese Kurien: He played a pivotal role in the success of the Kaira District Co-operative Milk Producers’ Union Ltd, which spurred the White Revolution. Often called the "Father of the White Revolution," his efforts transformed India into one of the largest milk producers in the world.

- Azar Iqbal: There is no significant connection known between Azar Iqbal and the White Revolution or the Kaira Union.

- Baba Amte: Renowned for his work with leprosy patients, Baba Amte's contributions are primarily in social and humanitarian fields, not related to the dairy sector.

- Sunderlal Bahuguna: He was a prominent environmentalist, known for his work with the Chipko movement. His efforts were focused on protecting forests, not dairy.