Choose the odd one out.

Options

A. Rabies, influenza, AIDS
B. Amoebiasis, giardiasis, trypanosomiasis
C. Taeniasis, ascariasis, elephantiasis
D. Cancer, tuberculosis, tetanus

Answer

To solve the question "Choose the odd one out," we need to analyze the given options based on the causative agents of the diseases listed in each option.

### Step-by-Step Solution:

1. **Analyze the First Option:**
- Diseases: Rabies, Influenza, AIDS
- Causative Agents:
- Rabies: Caused by the rabies virus (a virus)
- Influenza: Caused by the influenza virus (a virus)
- AIDS: Caused by HIV (a virus)
- Conclusion: All three diseases are caused by viruses.

2. **Analyze the Second Option:**
- Diseases: Amoebiasis, Giardiasis, Trypanosomiasis
- Causative Agents:
- Amoebiasis: Caused by Entamoeba histolytica (a protozoan)
- Giardiasis: Caused by Giardia lamblia (a protozoan)
- Trypanosomiasis: Caused by Trypanosoma (a protozoan)
- Conclusion: All three diseases are caused by protozoans.

3. **Analyze the Third Option:**
- Diseases: Teniasis, Ascariasis, Elephantiasis
- Causative Agents:
- Teniasis: Caused by Taenia solium (a helminth)
- Ascariasis: Caused by Ascaris lumbricoides (a helminth)
- Elephantiasis: Caused by Wuchereria bancrofti (a helminth)
- Conclusion: All three diseases are caused by helminths (worms).

4. **Analyze the Fourth Option:**
- Diseases: Cancer, Tuberculosis, Tetanus
- Causative Agents:
- Cancer: Not caused by an infectious agent; it is due to uncontrolled cell division.
- Tuberculosis: Caused by Mycobacterium tuberculosis (a bacterium)
- Tetanus: Caused by Clostridium tetani (a bacterium)
- Conclusion: This option includes one disease (cancer) that is not caused by an infectious agent, while the other two are caused by bacteria.

5. **Final Conclusion:**
- The fourth option (Cancer, Tuberculosis, Tetanus) is the odd one out because it includes cancer, which is not caused by an infectious agent, while the other options consist of diseases caused by viruses, protozoans, or helminths.

### Answer:
The odd one out is the fourth option: **Cancer, Tuberculosis, Tetanus.**