Explanation:

- White Revolution:

- This movement is associated with dairy production and milk.

- It aimed at increasing milk production in India.

- Dr. Verghese Kurien was a prominent figure in this initiative.

- It led to India becoming one of the top milk producers in the world.

- Option 1: Bamboo

- Not related to White Revolution.

- Bamboo is more connected to environmental or industrial applications.

- Option 2: Cash Crop

- Typically refers to crops grown for direct sale in markets.

- Does not relate to White Revolution.

- Option 3: Milk

- White Revolution is directly associated with milk.

- Option 4: Foodgrain

- Related to the Green Revolution, not the White Revolution.