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Coenzymes NAD and NADP contain the vitamin

1. Niacin
2. Biotin
3. Thiamine
4. Vitamin \( B_{12} \) E. Vitamin \( A \)

Correct answer: Niacin

Solution

NAD and NADP are derived from niacin, also called vitamin B3, specifically its nicotinamide component. This vitamin is required to synthesize these electron-carrying coenzymes.

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