Human must obtain all their vitamin B12 form their diet :

Vitamin B12 deficiency causes pernicious anemia. Animals cannot synthesize vitamin B12. Human must obtain all their vitamin B12 form 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)

Anurag Mishra Professor Asked on 15th February 2016 in Biology.
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    Answer: (c) Co3+ (Cobalt ion)

    Anurag Mishra Professor Answered on 16th February 2016.
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