Which of the following statements about vitamin B12 is incorrect ? 

Which of the following statements about vitamin B12 is incorrect ? 

  1. A

    It has a cobalt atom 

  2. B

    It also occurs in plants  

  3. C

    It is also present in rain water  

  4. D

    It is needed for human body in very small amounts 

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    Solution:

    Vitamin B12​ does not exist in plants, but is synthesized by microorganisms (bacteria, fungi). 

    Therefore, humans must obtain B12​ in the diet, either from animal sources (red meat, fish, poultry, eggs and dairy products).

    Cobalt is also an essential trace element for humans, and is found at the center of vitamin B12 and a range of other co-enzymes called cobalamins.

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