Vitamin B12 deficiency causes pernicious anaemia. Animals cannot synthesise vitamin B12. Humans must obtain all their vitamin B12 from their diet. The complexing metal ion in Vitamin B12 is.
A. Mg2+ (Magnesium ion)
B. Fe2+ (Iron ion)
C. CO3+ (Cobalt ion)
D. Zn2+ (Zinc ion)
Answer: Option C
This Question Belongs to Chemistry GK Chapter Wise >> Biomolecules And Polymers
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