The correct answer is: a) Natural gas.
Andhra Pradesh is a state in India that is located on the Bay of Bengal. The coastline of Andhra Pradesh is rich in reserves of natural gas. Natural gas is a fossil fuel that is found in underground deposits. It is a mixture of gases, including methane, ethane, propane, and butane. Natural gas is used for a variety of purposes, including heating, cooking, and generating electricity.
The other options are incorrect. Petroleum is a fossil fuel that is found in underground deposits. It is a mixture of hydrocarbons, including gasoline, diesel fuel, and kerosene. Petroleum is used for a variety of purposes, including transportation, heating, and manufacturing. Manganese is a metal that is found in rocks and minerals. It is used in a variety of products, including batteries, steel, and alloys. Uranium is a radioactive metal that is found in rocks and minerals. It is used in nuclear power plants.