The correct answer is: a) Salt production.
The Andro feudatory state was located in the present-day state of Andhra Pradesh, India. It was known for its significant salt production. The state had a number of salt pans, which were used to extract salt from seawater. The salt was then traded with other parts of India.
The other options are incorrect. Option b) is incorrect because the Andro feudatory state was not known for its textile weaving. Option c) is incorrect because the Andro feudatory state was not known for its pottery crafts. Option d) is incorrect because the Andro feudatory state was not known for its iron smelting.
Salt production is the process of extracting salt from seawater or other saline sources. Salt is an essential mineral for human health and is used in a variety of food and industrial applications. Salt production has been a major industry for centuries, and the Andro feudatory state was one of the leading producers of salt in India.