The metal present in vitamin `B_(12)` is

The metal ion present in vitamin B_12 is

Which transition metal is present in vitamin B_(12) ?

The element present' in vitamin B_12

(a) Name the metal present in Vitamin- B_(12) . (b) What is Zwitter ion? (c) Name the metal present in green leaves.

which metal is present in vitamin B_(12) or cyanocobalamin?