Question

The chemical name of vitamin D is:
A. Retinol
B. Ferredoxin
C. Calciferol
D. Ergosterol

Answer 1

Hint: Vitamin D can be naturally obtained by the sunlight, but it can be found in some food supplements also. The vitamin D consists of a 6-membered ring and a 9-membered ring. It can be used to treat the low concentration of calcium in the blood.

Complete answer:
- In the given question, we have to tell another name which is used for vitamin D.
- Calciferol is another name for the vitamin D.
- Vitamin D is consumed by the person to treat the deficiency of the vitamin D in the body and to treat the low concentration of the calcium by increasing the ability of the intestine to absorb the calcium.
- The vitamin is important otherwise the bones can become weak where if vitamin D is taken in the excess concentration then it may cause the calcification of the tissue.
- Along with the tissue calcification, it can also cause high blood pressure, kidney failure and stones, etc.
- In human beings, two forms of vitamin D are found that is $\text{Vitamin }{{\text{D}}_{3}}\text{ and Vitamin }{{\text{D}}_{2}}$
- Here, $\text{Vitamin }{{\text{D}}_{3}}$ is also known as cholecalciferol and $\text{Vitamin }{{\text{D}}_{2}}$ is also known as ergocalciferol.
 - That's why option D is the incorrect answer.
- Whereas retinol is common of vitamin A which can be obtained from the cod liver oil, egg, yellow and orange vegetables, etc.
- Ferredoxin is a type of protein which is used for the electron transfer.

Therefore, option C is the correct answer.

Note:
Both forms of the vitamin can be taken by the diet and ingested in the body whereas vitamin D is found in very few diet supplements that's why absorbed from the sunlight. In infants when there is vitamin D deficiency then it causes rickets.