A) cobalt
B) manganese
C) magnesium
D) iron
Correct Answer: A
Solution :
Vitamin \[{{\text{B}}_{\text{12}}}\] or cyanocobalamin is a water soluble vitamin and contain cobalt and its deficiency cause a serious type of anemia. Magnesium is a component of chlorophyll molecule. Iron is a component of haemoglobin molecule.You need to login to perform this action.
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