Multiple choice

Which of the following is a vitamin?

  1. Betulin

  2. Butylated hydroxytoluene

  3. Biotin

  4. Biphenyl
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Biotin is a water-soluble B-complex vitamin (vitamin B7).  It was discovered by Bateman in 1916. It is composed of a ureido (tetrahydroimidizalone) ring fused with a tetrahydrothiophene ring.

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