Which part of the human body is affected in the disease T.B.?

Options

A. Liver
B. Stomach
C. Lungs
D. Kidney

Explanation

**Step-by-Step Solution:**

1. **Understanding Tuberculosis (TB):**
- Tuberculosis, commonly known as TB, is an infectious disease caused by bacteria.

2. **Identifying the Causative Agent:**
- The specific bacterium responsible for TB is called *Mycobacterium tuberculosis*.

3. **Recognizing the Affected Body Part:**
- TB primarily affects the lungs. This is where the bacteria cause infection and can lead to the destruction of lung tissue.

4. **Conclusion:**
- Therefore, the part of the human body that is affected by TB is the lungs.

**Final Answer:**
- The lungs are affected in the disease TB.

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