The correct answer is d) Thiruvananthapuram.
China clay, also known as kaolin, is a fine, white clay that is used in a variety of products, including ceramics, paper, and cosmetics. It is primarily found in the state of Kerala, India. The largest deposits of china clay in Kerala are located in the districts of Thiruvananthapuram, Kollam, and Pathanamthitta.
China clay is formed from the weathering of feldspar, a type of mineral that is found in granite. The feldspar is broken down by water and acids, and the resulting clay is deposited in layers. The clay is then mined and processed to remove impurities.
China clay is a valuable resource that is used in a variety of industries. It is a key ingredient in ceramics, as it helps to give the finished product its strength and durability. China clay is also used in papermaking, as it helps to absorb water and improve the quality of the paper. It is also used in cosmetics, as it helps to absorb oil and give the skin a smooth appearance.
The demand for china clay is expected to grow in the coming years, as it is used in a variety of new applications. For example, china clay is being used to develop new types of batteries and solar cells. The growing demand for china clay is likely to lead to increased exploration and mining of the mineral in Kerala.