Tamil Nadu is a significant producer of:

Cement
Chemicals and fertilizers
Wind turbines
All of the above

The correct answer is: d) All of the above.

Tamil Nadu is a significant producer of cement, chemicals and fertilizers, and wind turbines.

Cement is a building material made from limestone, clay, sand, and iron ore. It is used to make concrete, which is a strong and durable material used in construction. Tamil Nadu is the second largest producer of cement in India, after Gujarat.

Chemicals and fertilizers are used in a variety of industries, including agriculture, manufacturing, and pharmaceuticals. Tamil Nadu is a major producer of chemicals and fertilizers, including ammonia, urea, and phosphoric acid.

Wind turbines are used to generate electricity from the wind. Tamil Nadu has the largest installed capacity of wind power in India, with over 7,000 megawatts of capacity.

In addition to these three major industries, Tamil Nadu is also a significant producer of automobiles, textiles, and electronics.