Which one of the following vitamins is water-soluble?

Options

A. Vitamin -B
B. Vitamin -E
C. Vitamin-K
D. Vitamin-A

Explanation

To determine which vitamin is water-soluble, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Categories of Vitamins**:
- Vitamins are categorized into two main groups: water-soluble and fat-soluble vitamins.
- Water-soluble vitamins dissolve in water and are excreted from the body through urine and sweat, which means they need to be consumed regularly in the diet.

2. **Identify Water-Soluble Vitamins**:
- The water-soluble vitamins primarily include the B-complex vitamins and vitamin C.
- The B-complex vitamins consist of several types, such as B1 (thiamine), B2 (riboflavin), B3 (niacin), B5 (pantothenic acid), B6 (pyridoxine), B7 (biotin), B9 (folate), and B12 (cobalamin).
- It is important to note that while most B vitamins are water-soluble, vitamin B12 is an exception as it is stored in the liver and not excreted as readily as the others.

3. **Review the Options Given**:
- The question presents several options, one of which is vitamin B.
- Since the B vitamins (excluding B12) and vitamin C are water-soluble, we can conclude that vitamin B is indeed a water-soluble vitamin.

4. **Select the Correct Answer**:
- Based on the information provided, the correct answer to the question "Which one of the following vitamins is water-soluble?" is vitamin B.

### Final Answer:
- The water-soluble vitamin from the options provided is **Vitamin B**.