The largest part of the cropped area in India is occupied by rice. Let's understand this in detail:

Reasons for rice being the largest crop in India:

1. Climate: Rice requires a humid climate with temperatures ranging between 20°C to 37°C. India's tropical and sub-tropical regions provide the perfect climate for rice cultivation.

2. Water availability: Rice is a water-intensive crop, and India has an extensive network of rivers, canals, and irrigation systems, which provide abundant water supply for rice cultivation.

3. Soil fertility: Rice requires fertile and well-drained soil, which is available in abundance in the Gangetic plains, the northeastern states, and the southern peninsular region.

4. Consumption: Rice is the staple food of most Indians, and it is consumed in large quantities across the country.

5. Government policies: The government of India has implemented several policies to promote rice cultivation, including subsidies on seeds, fertilizers, and irrigation facilities.

Benefits of rice cultivation in India:

1. Employment: Rice cultivation provides employment to millions of farmers across the country.

2. Food security: Rice is a staple food of most Indians, and its cultivation ensures food security for the country.

3. Income: Rice cultivation is a profitable business, and it provides a source of income to farmers.

4. Export potential: India is one of the largest producers of rice in the world, and its export potential is high.

Conclusion:

In conclusion, rice is the largest crop in India, occupying the largest part of the cropped area due to favorable climate, water availability, soil fertility, consumption, and government policies. Its cultivation provides employment, food security, income, and export potential to the country.

Correct answer is 'c'. Rice