Causative factor of cancer is called

Options

A. oncogenes
B. radiogens
C. estrogens
D. carcinogens

Answer

To answer the question "Causative factor of cancer is called," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Options**: The question provides four options: oncogenes, radiogenes, histogenes, and carcinogens. We need to identify which of these terms refers to the causative factors of cancer.

2. **Defining Oncogenes**: Oncogenes are genes that have the potential to cause cancer. They can be normal genes (proto-oncogenes) that become mutated or expressed at high levels, leading to uncontrolled cell division.

3. **Defining Radiogenes**: The term "radiogenes" is not commonly used in the context of cancer causation. It may refer to genes affected by radiation, but it is not a recognized term for cancer causation.

4. **Defining Histogenes**: Histogenes typically refer to genes involved in the development of tissues. This term does not specifically relate to cancer causation.

5. **Defining Carcinogens**: Carcinogens are agents that can cause cancer. They can be physical agents (like UV rays and X-rays), chemical agents (like certain dyes and chemicals), or biological agents (like certain viruses). This definition aligns with the question about causative factors of cancer.

6. **Conclusion**: Based on the definitions, the correct answer to the question is **carcinogens**, as they are the agents that cause cancer.

### Final Answer:
The causative factor of cancer is called **carcinogens**.

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