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Which one of ...

Question

Which one of the following contains cobalt?

A

B_{1}

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B

B_{2}

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C

B_{6}

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D

B_{12}

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Solution

The correct option is B $B_{12}$
Cobalt is also an essential trace element for humans and is found at the center of vitamin $B_{12}$ and a range of other co-enzymes called cobalamins.
So the correct answer is option D.

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