Internal bleeding, blockage of intestinal passage may be caused by

Options

A. Salmonella
B. Ascaris
C. Entamoeba
D. Both 2 & 3

Answer

### Step-by-Step Solution:

1. **Identify the Organisms**: The question presents four options: Salmonella, Ascaris, Entamoeba, and both two and three. First, we need to identify the diseases caused by each organism.
- **Salmonella**: Causes typhoid fever.
- **Ascaris**: Causes Ascariasis.
- **Entamoeba**: Causes amebiasis.

2. **Understand the Symptoms**: Next, we need to understand the symptoms associated with each disease.
- **Typhoid**: Can cause internal perforation but not specifically internal bleeding.
- **Ascariasis**: Known for causing internal bleeding due to the burrowing of the Ascaris worm through the intestinal wall.
- **Amebiasis**: Typically results in bloody stools but does not cause internal bleeding.

3. **Focus on Internal Bleeding**: The question specifically asks about internal bleeding and blockage of the intestinal passage.
- **Ascaris** is unique in causing internal bleeding due to its life cycle where the larvae burrow through the intestinal wall.

4. **Conclusion**: Based on the symptoms and the specific mention of internal bleeding, the answer to the question is **Ascaris**.

5. **Final Answer**: Therefore, the correct answer is **Ascaris**.