Which of the following absorption is Na dependent?

Options

A. Water
B. Fats
C. Vitamin `B_12`
D. Fructose

Answer

To determine which absorption process is sodium-dependent from the given options, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Options**: The options provided are water, fats, vitamin B12, and fructose.

2. **Understand Sodium-Dependent Absorption**: Sodium-dependent absorption typically involves the co-transport of sodium ions with other molecules, such as glucose and amino acids, through specific transport proteins.

3. **Analyze Each Option**:
- **Water**: The absorption of water is primarily passive and does not require sodium.
- **Fats**: The absorption of fats occurs through diffusion and does not involve sodium.
- **Vitamin B12**: The absorption of vitamin B12 requires intrinsic factor and is not sodium-dependent.
- **Fructose**: Fructose absorption occurs through facilitated diffusion and is often associated with sodium transport mechanisms.

4. **Conclude**: Among the options, fructose absorption is linked to sodium-dependent mechanisms, as it can utilize sodium-dependent transporters in the intestine.

5. **Final Answer**: The absorption that is sodium-dependent is **fructose**.