Which of the following vitamins is not soluble in water ?

Options

A. C
B. `B_(1)`
C. `B_(2)`
D. D

Answer

To determine which of the following vitamins is not soluble in water, we will analyze each option provided:

1. **Vitamin C**:
- Vitamin C, also known as ascorbic acid, is a water-soluble vitamin. It plays a crucial role in the growth and repair of tissues in the body.

2. **Vitamin B1**:
- Vitamin B1, also known as thiamine, is another water-soluble vitamin. It is essential for carbohydrate metabolism and nerve function.

3. **Vitamin B2**:
- Vitamin B2, known as riboflavin, is also a water-soluble vitamin. It is important for energy production and the metabolism of fats, drugs, and steroids.

4. **Vitamin D**:
- Vitamin D is a fat-soluble vitamin. It is crucial for calcium absorption and bone health. Unlike the previous vitamins, it does not dissolve in water.

After analyzing all the options, we conclude that:

**The vitamin that is not soluble in water is Vitamin D.**