The correct option is D Calcium
Calcium is an important mineral nutrient. It is the major component of bones and teeth. Hence, it is easily the most abundant mineral element in the animal body. Calcium is also required for blood clotting, muscle contraction, ATPase, nerve impulse transmission, hear functioning etc. Deficiency of calcium will lead to deformed bones. Vitamin D is essential for calcium absorption. Deficiency of vitamin D produces rickets and muscle spasms