Which of the following is absorbed in proximal intestine `:-`

Options

A. Iron
B. Sodium
C. Bile salts
D. Vitamin `B_(12)`

Answer

To solve the question "Which of the following is absorbed in the proximal intestine?" we need to analyze the options provided and understand the absorption processes that occur in the small intestine, specifically in the proximal part (which is the duodenum).

### Step-by-Step Solution:

1. **Understanding the Proximal Intestine**:
- The proximal intestine refers to the first part of the small intestine, which is the duodenum. The small intestine is divided into three parts: duodenum, jejunum, and ileum.

2. **Functions of the Duodenum**:
- The duodenum is responsible for the initial digestion of food. It receives partially digested food from the stomach and mixes it with digestive juices from the pancreas and bile from the liver.
- It plays a crucial role in neutralizing the acidity of the chyme (partially digested food) that comes from the stomach.

3. **Absorption in the Duodenum**:
- The duodenum primarily absorbs water, electrolytes, and certain nutrients. Among these, sodium is absorbed in the duodenum.
- Iron is also absorbed in the proximal intestine, specifically in the duodenum.

4. **Analyzing the Options**:
- **Option A: Iron** - Absorbed in the duodenum.
- **Option B: Sodium** - Also absorbed in the duodenum.
- **Option C: Bile Salts** - Primarily absorbed in the ileum (not in the proximal intestine).
- **Option D: Vitamin B12** - Absorbed in the ileum (not in the proximal intestine).

5. **Conclusion**:
- Since both iron and sodium are absorbed in the proximal intestine, but the question asks for which of the following is absorbed, the most relevant answer is **Option A: Iron** as it is specifically highlighted in the context of absorption in the proximal intestine.

### Final Answer:
**The correct answer is Option A: Iron.**