Question

Calciferol is the name of

• A. Vitamin A
• B. Vitamin C
• C. Vitamin B2
• D. Vitamin D2

Hint:

Calciferol is also known as Vitamin D2, which is important for calcium absorption and bone health.

Answer 1

The Correct Option is D

Each vitamin has its own recognized chemical name, so we can match "calciferol" against them directly.

1. Vitamin A: Known as retinol, not calciferol.
2. Vitamin C: Known as ascorbic acid, not calciferol.
3. Vitamin B2: Known as riboflavin, not calciferol.
4. Vitamin D2: Correct - calciferol is the chemical name for Vitamin D2.

So the correct answer is Vitamin D2.

Answer 2

Another way to reach the same answer is to start from function rather than name - "calciferol" is closely tied to calcium, so identifying which vitamin's biological role centers on calcium metabolism narrows it down.

1. Vitamin A: Functions mainly in vision, immune health, and epithelial tissue maintenance, no direct role in calcium regulation.
2. Vitamin C: Functions mainly in collagen synthesis and as an antioxidant, also unrelated to calcium metabolism specifically.
3. Vitamin B2: Functions as a coenzyme in energy metabolism (as part of FAD/FMN), not related to calcium regulation either.
4. Vitamin D2: Functions specifically by promoting calcium and phosphate absorption in the intestine and supporting bone mineralization, this calcium-centric role is exactly what the "calci-" in calciferol is naming.

Matching biological function to the name gives the same vitamin.

Hence, the correct answer is Vitamin D2.