Assertion : Antigen can be easily recognized because it has antigenic determinants
Reason : The recognition ability is innate

Options

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

Explanation

To solve the question, we need to analyze both the assertion and the reason provided.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "Antigen can be easily recognized because it has antigenic determinants."
- Antigenic determinants, also known as epitopes, are specific parts of an antigen that are recognized by the immune system, particularly by antibodies. This statement is true because the presence of these determinants allows the immune system to identify and respond to specific antigens.

2. **Understanding the Reason**:
- The reason given is "The recognition ability is innate."
- Innate immunity refers to the non-specific defense mechanisms that are present from birth and do not adapt or change in response to specific pathogens. This statement is false in the context of the assertion because the ability to recognize specific antigens is not innate; it is acquired through exposure to different pathogens and the subsequent development of specific antibodies.

3. **Evaluating the Relationship**:
- Since the assertion is true (antigens are recognized due to antigenic determinants) and the reason is false (recognition ability is not innate), we can conclude that the assertion stands independently of the reason.

4. **Choosing the Correct Option**:
- Based on the analysis, the correct answer is: "Assertion is true, but reason is false."

### Final Answer:
- The assertion is true, but the reason is false.