In the co-enzyme B₁₂ the position occupied by a cyanide ion in vitamin B12 is bonded directly to the __________ of the ribose of adenosine.

In the co-enzyme B₁₂ the position occupied by a cyanide ion in vit

1.	In the co-enzyme B₁₂ the position occupied by a cyanide ion in vitamin B12 is bonded directly to the __________ of the ribose of adenosine.
A.	adenine
B.	5-6 dimethylbenzimidazole
C.	hydroxycobalamin
D.	cyanocobalamin
Answer» B. 5-6 dimethylbenzimidazole