Leprosy' is caused by

Options

A. Mycobacterium
B. Salmonella
C. Mococystis
D. TMV

Answer

**Step-by-Step Solution:**

1. **Identify the Options**: The question provides four options: Mycobacterium, Salmonella, Monocystis, and TMV.

2. **Evaluate TMV**: TMV stands for Tobacco Mosaic Virus. It is known to affect plants, not humans, so this option can be eliminated.

3. **Evaluate Monocystis**: Monocystis is a parasite that is associated with diseases like malaria. Since leprosy is not caused by Monocystis, this option can also be eliminated.

4. **Evaluate Salmonella**: Salmonella is a genus of bacteria that includes species such as Salmonella typhi, which causes typhoid fever. Since leprosy is not caused by Salmonella, this option can be eliminated as well.

5. **Identify the Correct Answer**: The first option is Mycobacterium. Specifically, Mycobacterium leprae is the bacterium that causes leprosy. Therefore, this is the correct answer.

6. **Conclusion**: The causative agent of leprosy is Mycobacterium leprae.

**Final Answer**: Leprosy is caused by Mycobacterium leprae.

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