Explanation:

- Option 1: Cotton

- Cotton is a major commercial crop grown for its fiber.

- It's used widely in the textile industry.

- Farmers grow it primarily for market sale rather than personal consumption.

- Cotton is indeed a commercial crop.

- Option 2: Bajra

- Bajra, also known as pearl millet, is a staple food crop.

- Typically grown for subsistence rather than commercial purposes.

- Option 3: Jowar

- Jowar, or sorghum, is primarily a food crop.

- It's an important source of nutrition and is usually not considered a commercial crop.

- Option 4: Paddy

- Paddy, or rice, is a staple food crop around the world.

- Like bajra and jowar, it's grown mainly for local consumption.