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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.

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. Correct Answer CO<sup>3+</sup> (Cobalt ion)

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Deficiency of which of the following vitamin causes pernicious anaemia ?