Common symptoms of amoebiasis are

Options

A. Constipation,stool with blood clots
B. Abdominal pain and cramp
C. Weakness
D. All of these

Answer

**Step-by-Step Solution:**

1. **Identify the Cause of Amoebiasis**: Amoebiasis is caused by a protozoan known as *Entamoeba histolytica*. Understanding the causative agent helps in recognizing the disease's nature.

2. **Transmission of the Disease**: Amoebiasis can be transmitted through contaminated water or food, often due to poor sanitation. It can also be spread by house flies that come into contact with fecal matter.

3. **Affected Area in the Body**: The infection primarily affects the large intestine, which is crucial for digestion and absorption of water.

4. **Common Symptoms**:
- **Constipation**: This can occur as the infection disrupts normal bowel function.
- **Stool Characteristics**: Patients may experience stools that contain blood clots or excessive mucus, indicating inflammation and damage to the intestinal lining.
- **Abdominal Pain and Cramps**: These are common as the intestines become irritated and inflamed.
- **Weakness**: This can result from dehydration and nutrient loss due to diarrhea or poor absorption.

5. **Conclusion**: All of the above symptoms are commonly associated with amoebiasis. Therefore, the correct answer is that all listed symptoms are common in this disease.

**Final Answer**: The common symptoms of amoebiasis include constipation, stool with blood clots, abdominal pain, cramps, and weakness. Thus, the correct option is "all of these."

---