€‹the vitamin that is responsible for regulating the absorption and metabolism of calcium and phosphorus for healthy bones and teeth is vitamin ​e

The answer is vitamin D. This is actually a group of vitamins of similar molecular structure responsible for facilitating increased absorption of calcium, magnesium and phosphate from the gut. The most important of the vitamin D compounds are vitamin D3 and D2. While vitamin D can be obtained from your diet and supplements, the major source of vitamin D is from a chemical reaction dependent on skin exposure to the sun.

Ithink the answer is d.