which of the following disease is caused by protozoans?

Options

A. (1) Ringworm and amoeboic dysentery
B. (2) Malaria and trichomoniasis
C. (3) Genital warts and Chlamydiasis
D. (4) Amoeboic dysentry and genital herpes

Answer

To determine which of the following diseases is caused by protozoans, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Protozoans**:
- Protozoans are primitive, single-celled eukaryotic organisms. They can be free-living or parasitic.

2. **Analyze the Options**:
- We have four options to evaluate which diseases are caused by protozoans.

3. **Evaluate Option A**:
- **Ringworm and Amoebic Dysentery**:
- Ringworm is caused by fungi, not protozoans.
- Amoebic dysentery is caused by the protozoan **Entamoeba histolytica**.
- Since one part of this option (ringworm) is incorrect, this option is not valid.

4. **Evaluate Option B**:
- **Malaria and Trichomoniasis**:
- Malaria is caused by the protozoan **Plasmodium**, which is transmitted by mosquitoes.
- Trichomoniasis is caused by the protozoan **Trichomonas vaginalis**.
- Both diseases in this option are caused by protozoans, making this a valid option.

5. **Evaluate Option C**:
- **Genital Warts and Chlamydiasis**:
- Genital warts are caused by a virus (human papillomavirus).
- Chlamydiasis is caused by a bacterium (Chlamydia trachomatis).
- Since both diseases in this option are not caused by protozoans, this option is invalid.

6. **Evaluate Option D**:
- **Amoebic Dysentery and Genital Herpes**:
- Amoebic dysentery is caused by the protozoan **Entamoeba histolytica**.
- Genital herpes is caused by a virus (herpes simplex virus).
- Since genital herpes is not caused by a protozoan, this option is also invalid.

7. **Conclusion**:
- The only option that includes diseases caused by protozoans is **Option B: Malaria and Trichomoniasis**.

### Final Answer:
**The disease caused by protozoans is Option B: Malaria and Trichomoniasis.**

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