Co-enzyme nicotinamide adenine dinucleotide (NAD) contains vitamin

Options

A. thiamine
B. niacin
C. riboflavin
D. none of these.

Explanation

To answer the question regarding which vitamin is contained in the coenzyme nicotinamide adenine dinucleotide (NAD), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Coenzyme**: The question mentions the coenzyme nicotinamide adenine dinucleotide, commonly abbreviated as NAD.

2. **Understand the Components of NAD**: NAD is composed of two main components: nicotinamide and adenine. The full name is nicotinamide adenine dinucleotide.

3. **Recognize the Role of Vitamins**: Coenzymes often derive from vitamins. In the case of NAD, the relevant vitamin is essential for its formation and function.

4. **Identify the Vitamin**: The vitamin associated with NAD is Vitamin B3, which is also known as niacin. Niacin exists in two forms: nicotinic acid and nicotinamide.

5. **Conclusion**: Therefore, the coenzyme nicotinamide adenine dinucleotide (NAD) contains Vitamin B3 (niacin).

### Final Answer:
Coenzyme nicotinamide adenine dinucleotide (NAD) contains Vitamin B3 (niacin).

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