Which of the following mineral salts is a trace element?

Zinc is a trace element among the listed mineral salts. A trace element is a mineral that is required by the body in very small amounts, typically less than 100 milligrams per day. Zinc is an essential mineral that plays a crucial role in many bodily processes, including immune function, wound healing, and DNA synthesis. Although it is only required in small amounts, it is still an important mineral that the body needs to function properly. The other minerals listed, such as carbon, hydrogen, potassium, and calcium, are also important for various bodily processes, but they are not classified as trace elements.