Assertion: Protein that produced in response to antibodies are called antigens.
Reason: Antibodies are present on the surface of RBCs

Options

A. If both asseration and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true reason is false.
D. If both assertion and reason are false.

Explanation

To solve the question regarding the assertion and reason, we need to analyze both statements carefully.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states: "Proteins that are produced in response to antibodies are called antigens."
- This statement is incorrect. Antigens are actually foreign substances (like pathogens) that trigger the immune response, leading to the production of antibodies. Therefore, antigens are not produced in response to antibodies; rather, antibodies are produced in response to antigens.

2. **Understanding the Reason**:
- The reason states: "Antibodies are present on the surface of RBCs."
- This statement is also incorrect. Antibodies are not found on the surface of red blood cells (RBCs). Instead, antibodies are present in the blood plasma, which is the liquid component of blood. RBCs do have antigens on their surface that determine blood types, but not antibodies.

3. **Conclusion**:
- Since both the assertion and the reason are incorrect, we can conclude that the correct option is that both the assertion and reason are false.

### Final Answer:
Both the assertion and reason are false.