Question

This vitamin is also called cyanacobalamin % OCR has "cyanacobalamin", should be cyanocobalamin

• A. B\(_6\)
• B. B\(_3\)
• C. B\(_{12}\)
• D. B\(_2\)

Hint:

Common B-Vitamins and their names: - B\(_1\): Thiamine - B\(_2\): Riboflavin - B\(_3\): Niacin - B\(_5\): Pantothenic Acid - B\(_6\): Pyridoxine - B\(_7\): Biotin - B\(_9\): Folic Acid / Folate - B\(_{12}\): Cobalamin (Cyanocobalamin is a prominent form). Vitamin B\(_{12}\) is unique for containing a cobalt atom.

Answer 1

The Correct Option is C

Step 1: Recall the chemical names of B-complex vitamins.
- Vitamin B\(_1\): Thiamine - Vitamin B\(_2\): Riboflavin - Vitamin B\(_3\): Niacin (or Nicotinic acid / Nicotinamide) - Vitamin B\(_5\): Pantothenic acid - Vitamin B\(_6\): Pyridoxine (also pyridoxal, pyridoxamine) - Vitamin B\(_7\): Biotin (sometimes called Vitamin H) - Vitamin B\(_9\): Folic acid (or Folate) - Vitamin B\(_{12}\): Cyanocobalamin (a common synthetic form), or more generally, cobalamin.
It contains cobalt.

Step 2: Identify the vitamin corresponding to cyanocobalamin.
Cyanocobalamin is Vitamin B\(_{12}\).
This matches option (3).