The correct answer is A) Khammam.
Barytes is a mineral that is used in various industries, including the oil and gas industry, the paint industry, and the paper industry. It is a heavy mineral that is used to weight down drilling mud and to make paints opaque. It is also used to make paper more absorbent.
Barytes is found in many parts of the world, but the largest deposits are found in China, India, and the United States. In India, the largest deposits of barytes are found in the Khammam district of Andhra Pradesh. The barytes in Khammam is of high quality and is used in many industries.
The other options are incorrect because they are not districts where barytes is found in significant deposits. Adilabad, Warangal, and Mahabubnagar are all districts in Andhra Pradesh, but they do not have significant deposits of barytes.