The three portions of the small intestine, in the correct order, are:

Options

A. caecum, colon, rectum
B. ileum, duodenum, jejunum
C. colon, caecum, rectum
D. duodenum, jejunum, ileum

Explanation

To answer the question regarding the three portions of the small intestine in the correct order, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Parts of the Small Intestine**: The small intestine is divided into three main parts: Duodenum, Jejunum, and Ileum.

2. **Order the Parts**: The correct order of these parts, starting from the stomach and moving towards the large intestine, is:
- **Duodenum**: This is the first part of the small intestine where most of the digestion occurs.
- **Jejunum**: This is the second part, which continues the process of digestion and absorption of nutrients.
- **Ileum**: This is the final part of the small intestine that connects to the large intestine.

3. **Summarize the Answer**: Therefore, the three portions of the small intestine in the correct order are:
- **Duodenum**
- **Jejunum**
- **Ileum**

### Final Answer:
Duodenum, Jejunum, Ileum.

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