Question
Vitamin - $${B_{12}}$$ contains
A.
$$Zn\left( {II} \right)$$
B.
$$Ca\left( {II} \right)$$
C.
$$Fe\left( {II} \right)$$
D.
$$Co\left( {III} \right)$$
Answer :
$$Co\left( {III} \right)$$
Solution :
The molecular formula of vitamin - $${B_{12}}$$ is $${C_{63}}{H_{88}}\,\,{N_{14}}{O_{14}}PCo$$ and the chemical name is cyanocobalamine. So, cobalt is present in vitamin - $${B_{12}}.$$