A district known for its textile industry is:

Erode
Kanchipuram
Madurai
Salem

The correct answer is: b) Kanchipuram.

Kanchipuram is a city in the Indian state of Tamil Nadu. It is known for its silk sarees, which are made from the finest silk and are considered to be some of the most beautiful in the world. The city has a long history of textile production, and its sarees are exported all over the world.

Erode is a city in the Indian state of Tamil Nadu. It is known for its cotton textiles, which are produced in a number of small and medium-sized factories. The city is also home to a number of spinning mills and weaving mills.

Madurai is a city in the Indian state of Tamil Nadu. It is known for its handloom textiles, which are made from a variety of fibers, including cotton, silk, and wool. The city has a long history of textile production, and its textiles are exported all over the world.

Salem is a city in the Indian state of Tamil Nadu. It is known for its iron and steel industry, which is one of the largest in India. The city is also home to a number of textile mills, which produce a variety of fabrics, including cotton, silk, and wool.