The most important food crop grown in Tamil Nadu is:

The most important food crop grown in Tamil Nadu is rice. Rice is a staple food in Tamil Nadu and is grown in most parts of the state. It is a major source of income for farmers and employs a large number of people. Rice is also a major export crop for Tamil Nadu.

Wheat is not a major food crop in Tamil Nadu. It is grown in some parts of the state, but it is not as important as rice. Wheat is not a staple food in Tamil Nadu and is not as widely consumed as rice.

Maize is not a major food crop in Tamil Nadu. It is grown in some parts of the state, but it is not as important as rice or wheat. Maize is not a staple food in Tamil Nadu and is not as widely consumed as rice or wheat.

Millet is not a major food crop in Tamil Nadu. It is grown in some parts of the state, but it is not as important as rice, wheat, or maize. Millet is not a staple food in Tamil Nadu and is not as widely consumed as rice, wheat, or maize.

In conclusion, the most important food crop grown in Tamil Nadu is rice. Rice is a staple food in Tamil Nadu and is grown in most parts of the state. It is a major source of income for farmers and employs a large number of people. Rice is also a major export crop for Tamil Nadu.