Question

Vitamin $B_{12}$ contains

• A. Zn (II)
• B. Ca (II)
• C. Fe (II)
• D. Co (III)

Answer 1

Answer: (D)

Co (III)

Answer 2

The molecular formula of vitamin $-B_{12}$ is $N_{14} O_{14} PCo$ and the chemical name is cyanocobalamine. So, cobalt is present in vitamin-$B_{12}$