The correct answer is option A, that is, the RDA for calcium.
Calcium is a mineral found in various foods. The body requires calcium to sustain strong bones and to conduct various essential functions. The majority of all the calcium is accumulated in the teeth and bones, where it supports their hardness and composition.
The minimum daily need of calcium is 1000 milligrams in a day for the adults between the age range of 19 to 50 years, and 1200 mg for adults over the age of 70.
