Which of the following transition metal is present Vitamin B12 ?

Question

Which of the following transition metal is present in Vitamin B₁₂ ?

(a) Cobalt 

(b) Platinum 

(c) Copper 

(d) Iron

Answer 1

Cobalt is present in Vitamin B₁₂.

Answer 2

Vitamin B12 (B12 – cyanocobalamin), the last vitamin characterized, is the largest (MW1355) of all vitamins and has several unique features. All cobalamins (vitamin B12 derivatives) contain the rare transition metal, cobalt (Co), positioned in the center of a corrin ring.