हरितक्रांतीच्या काळात ________ हे भारताचे अन्न मंत्री होते.

The correct answer is Option C (C. Subramaniam).

Key Points:
• Green Revolution in India (Mid-1960s): Initiated to overcome chronic food shortages and famine risks through High-Yielding Variety (HYV) seeds, irrigation, and chemical fertilizers.
• Role of C. Subramaniam (1910–2000): As the Union Minister for Food and Agriculture (1964–1966) under Prime Minister Lal Bahadur Shastri, he provided crucial political leadership to implement modern agricultural strategy.
• Scientific Collaboration: He strongly backed agricultural scientist Dr. M.S. Swaminathan and facilitated the import of semi-dwarf Mexican wheat varieties developed by Dr. Norman Borlaug.
• Bharat Ratna: Honored with the Bharat Ratna in 1998 for his visionary leadership in steering India toward food self-sufficiency.
• Key Political Architect: C. Subramaniam was the Food and Agriculture Minister during the onset of the Green Revolution.
• Key Takeaway: C. Subramaniam was the Union Food and Agriculture Minister who spearheaded the Green Revolution in India.