Calcium is the most plentiful mineral found in the human body. The teeth and bones contain the most calcium. Nerve cells, body tissues, blood, and other body fluids contain the rest of the calcium. About 99% of the body's calcium is stored in the bones, but cells (particularly muscle cells) and blood also contain calcium. Calcium is essential for the following: Formation of bone and teeth. Muscle contraction.
So, the correct option is B.