Question

Vitamin $B_{12}$ is a complex of cobalt. If true enter 1, else enter 0.

Answer 1

Vitamin $B_{12}$ is a complex of cobalt. It is cyanocobalamin $\left(C_{63}{H}_{88}Co{N}_{14}{O}_{14}P\right)$. Its main sources are meat, fish, egg, milk etc. Its deficincy is responsible for pernicious anaemia.