Which of the following vitamin acts as important component of NADP (&) NAD ?

Options

A. `A`
B. `D`
C. `B_(3)`
D. `B_(12)`

Answer

To determine which vitamin acts as an important component of NADP (Nicotinamide Adenine Dinucleotide Phosphate) and NAD (Nicotinamide Adenine Dinucleotide), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Components of NAD and NADP**:
- NAD and NADP are coenzymes that play crucial roles in cellular metabolism. They are involved in redox reactions, which are essential for energy production in cells.

2. **Identify the Vitamins Related to NAD and NADP**:
- NAD and NADP are derived from the vitamin niacin. Niacin is also known as vitamin B3.

3. **Review the Options Given**:
- The options provided are:
- Vitamin A
- Vitamin D
- Vitamin B3
- Vitamin B12

4. **Select the Correct Option**:
- Since we established that niacin (vitamin B3) is a precursor for NAD and NADP, we can conclude that the correct answer is **Vitamin B3**.

5. **Final Answer**:
- Therefore, the vitamin that acts as an important component of NAD and NADP is **Vitamin B3**.