Determine the activity where a interferon, a biological response modifier, is involved

Options

A. Activation of immune system
B. Suppression of immune system
C. Making cancerous cells detectable by immune system
D. Both (A) and (c)

Answer

To determine the activity where interferon, a biological response modifier, is involved, we can analyze the options provided in the question step by step.

### Step-by-Step Solution:

1. **Understanding Interferons**: Interferons are proteins produced by cells in response to viral infections. They play a crucial role in the immune response by signaling neighboring cells to enhance their defenses against pathogens.

2. **Evaluating Option 1 - Activation of Immune System**:
- Interferons are known to activate the immune system. When a cell is infected by a virus, it produces interferons, which then help to alert and activate other immune cells to fight off the infection.
- **Conclusion**: This option is correct.

3. **Evaluating Option 2 - Suppression of Immune System**:
- Interferons do not suppress the immune system; rather, they enhance its activity. Therefore, this option is incorrect.
- **Conclusion**: This option is incorrect.

4. **Evaluating Option 3 - Making Cancerous Cells Detectable by Immune System**:
- Interferons can also play a role in making cancerous cells more recognizable to the immune system, which can help in targeting and destroying these cells. This is an important function of interferons in cancer therapy.
- **Conclusion**: This option is correct.

5. **Evaluating Option 4 - Both A and C**:
- Since both the first option (activation of the immune system) and the third option (making cancerous cells detectable) are correct, this option is also correct.
- **Conclusion**: This option is correct.

### Final Answer:
The correct answer is **Option 4: Both A and C**.