Entamoeba histolytica resides in human alimentary canal

Options

A. Intestine
B. Rectum
C. Stomach
D. Oral cavity.

Answer

**Step-by-Step Solution:**

1. **Identify the Organism**: The question refers to *Entamoeba histolytica*, which is a protozoan parasite known to infect humans.

2. **Understand the Habitat**: *Entamoeba histolytica* primarily resides in the human alimentary canal. The alimentary canal includes various parts such as the mouth, stomach, intestines, and rectum.

3. **Determine the Specific Location**: Among the options provided (intestine, rectum, stomach, oral cavity), we need to identify where *Entamoeba histolytica* is most commonly found.

4. **Review the Effects of Infection**: This organism causes a disease known as amoebiasis, which can lead to symptoms ranging from asymptomatic colonization to severe diarrhea and intestinal hemorrhage.

5. **Conclude the Correct Answer**: Based on the information that *Entamoeba histolytica* resides in the intestines and is responsible for causing intestinal issues, the correct answer is the **intestine**.

**Final Answer**: The correct answer is **intestine**.

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