Which disease is caused by activation of oncogenes?

Options

A. Cancer
B. Cholera
C. Virus flu
D. Tuberculosis

Answer

**Step-by-Step Solution:**

1. **Understanding Oncogenes**: Oncogenes are genes that have the potential to cause cancer. They are mutated forms of proto-oncogenes, which normally help regulate cell growth and division.

2. **Activation of Oncogenes**: When oncogenes are activated, they can lead to uncontrolled cell proliferation, which is a hallmark of cancer. This activation can occur due to various factors such as mutations, viral infections, or environmental influences.

3. **Identifying the Disease**: The question asks for a disease caused by the activation of oncogenes. The primary disease associated with oncogene activation is cancer.

4. **Evaluating the Options**:
- **Option A**: Cancer-related genes - This is a general term and does not specify a disease.
- **Option B**: Cholera - This is caused by contaminated water and food, unrelated to oncogenes.
- **Option C**: Viral flu - This is caused by a virus, not related to oncogenes.
- **Option D**: Tuberculosis - This is a bacterial infection caused by Mycobacterium tuberculosis, also unrelated to oncogenes.

5. **Conclusion**: The only disease that is directly caused by the activation of oncogenes is cancer. Therefore, the correct answer is cancer.

**Final Answer**: The disease caused by the activation of oncogenes is cancer.

---