Multiple choice general knowledge science & technology

It is structurally the most complicated vitamin and it contains the biochemically rare element cobalt.

  1. vitamin B12

  2. vitamin B1

  3. vitamin C

  4. vitamin A
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A Correct answer
Explanation

Vitamin B12 (cobalamin) has the most complex chemical structure of all vitamins and contains cobalt, giving it the name cobalamin. Other vitamins like A, B1 (thiamine), and C have simpler structures and don't contain rare elements like cobalt.

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