Read the following statements
a) Interferons are secreted by viral infected cell & protect viral infected cells from further infection.
b) Interferons are secreted by viral infected cells & protect non-infected cell from further viral infection.
c) Interferons are secreted by normal cell & protect non-infected cell from further viral infection.
d) Interferons are secreted by normal cell & protect adjacent viral infected cell from further infection.
How many statements are wrong?

Options

A. One
B. Two
C. Three
D. Four

Answer

To solve the question regarding the statements about interferons, we will analyze each statement one by one to determine how many are incorrect.

### Step-by-Step Solution:

1. **Statement A**: "Interferons are secreted by viral infected cells & protect viral infected cells from further infection."
- **Analysis**: Interferons are indeed secreted by viral infected cells, but they do not protect the infected cells themselves; rather, they protect neighboring uninfected cells from becoming infected. Therefore, this statement is **incorrect**.

2. **Statement B**: "Interferons are secreted by viral infected cells & protect non-infected cells from further viral infection."
- **Analysis**: This statement is accurate. Interferons are released by cells infected with a virus and serve to protect adjacent non-infected cells from viral infection. Therefore, this statement is **correct**.

3. **Statement C**: "Interferons are secreted by normal cells & protect non-infected cells from further viral infection."
- **Analysis**: This statement is incorrect because interferons are not secreted by normal (uninfected) cells; they are secreted by cells that are already infected with a virus. Thus, this statement is **incorrect**.

4. **Statement D**: "Interferons are secreted by normal cells & protect adjacent viral infected cell from further infection."
- **Analysis**: This statement is also incorrect. Interferons are not secreted by normal cells, and they do not protect infected cells; they protect uninfected cells. Therefore, this statement is **incorrect**.

### Conclusion:
- **Incorrect Statements**: A, C, and D are incorrect.
- **Total Number of Incorrect Statements**: 3

Thus, the answer to the question is that **3 statements are wrong**.

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