Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
Vitamin B_{12} deficiency causes pernicious aneamia. Animals cannot synthesize vitamin B_{12} Humans must obtain all their vitamin B_{12} from their diet. The complexing metal ion in vitamin B_{12} is:
[CDS I 2016]
1) Mg^ 2+ (Magnesium ion)
2) Fe^ 2+ (Iron ion)
3) Co^ 3+ (Cobalt ion)
4) Zn^ 2+ (Zinc ion)
3) Co^ 3+ (Cobalt ion)