Question

The metal present in Vitamin $B_{12}$ is :

• A. cobalt
• B. magnesium
• C. manganese
• D. iron

Answer 1

Answer: (A)

(i) Cobalt: It is present in vitamin $B_{12}$.
The cobalt atom is coordinated to 4 nitrogen atom.
(ii) Magnesium: It is found in chlorophyll.
(iii) Iron: It is found in haemoglobin.