Multiple choice

The chemical name of vitamin B is

  1. nicotinamide

  2. ascorbic acid

  3. riboflavin

  4. thiamine
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D Correct answer
Explanation

Thiamine (vitamin B1) was the first B vitamin discovered and is often referred to simply as vitamin B in older contexts. Other options: riboflavin is B2, nicotinamide is a form of B3, and ascorbic acid is vitamin C.

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