Maheshwar, located on the banks of the Narmada River, is a center for weaving:

Cotton and silk sarees
Metalwork
Carpet weaving
Pottery

The correct answer is A) Cotton and silk sarees.

Maheshwar is a town in the Dhar district of Madhya Pradesh, India. It is located on the banks of the Narmada River, about 200 kilometers from the state capital, Bhopal. Maheshwar is a popular tourist destination, known for its temples, palaces, and handicrafts.

The town is also a center for the weaving of cotton and silk sarees. The sarees are made using traditional methods, and are known for their intricate designs and beautiful colors. Maheshwar sarees are popular all over India, and are also exported to other countries.

The other options are incorrect. Option B, metalwork, is not a major industry in Maheshwar. Option C, carpet weaving, is also not a major industry in the town. Option D, pottery, is a minor industry in Maheshwar, but it is not as important as the weaving of cotton and silk sarees.