Q. Which of the following metals is present in vitamin-$B_{12}$?
A) Cobalt
B) Copper
C) Zinc
D) Magnesium
Explanation
Vitamin-$B_{12}$ or cyanocobalamin is a dark red-cooloured cobalt based vitamin having porphyrin ring in its structure.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.