Biomolecules — Chemistry STD 12 Science — Question

3. Vitamin B_12​

Explanation:

The vitamin having metal atom is Vitamin B₁₂​(cobalamin) as it contains a metal ion (cobalt).

Additional Information

It is also called cyanocobalamin

Vitamin B₁₂​ contributes to the formation of red blood cells and bone marrow, the metabolism of carbohydrates, fats and proteins and the production of genetic materials.

Vitamin B₁₂​ is mainly present in animal products, such as meat, poultry, fish, eggs, seaweed, and to a lesser extent in milk and dairy products.