The vitamins which is neither soluble in water nor in fat is

Explanation

To solve the question of which vitamin is neither soluble in water nor in fat, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Vitamin Solubility**:
- Vitamins are classified into two main categories based on their solubility: water-soluble vitamins and fat-soluble vitamins.
- Water-soluble vitamins include the B-complex vitamins and vitamin C, which dissolve easily in water.
- Fat-soluble vitamins include vitamins A, D, E, and K, which dissolve in fats and oils.
...