Q.

Which of the following vitamins contain nitrogen?

A. Vitamin A
B. Vitamin B
C. Vitamin C
D. Vitamin D
Answer» B. Vitamin B
Explanation: Vitamin B contains nitrogen atoms that allow them to participate in regulating metabolism. For example, Vitamin B3 is a water soluble vitamin containing compound Niacin or Niacinamide, a nitrogen containing vitamin.
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