Assertion :- Innate immunity is of great importance in early life years.
Reason :- Innate immunity is also called congenital immunity and protects new born since birth.

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is False.
D. If both Assertion & Reason are False.

Answer

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "Innate immunity is of great importance in early life years."
- Innate immunity is the type of immunity that is present at birth and serves as the body's first line of defense against pathogens.

2. **Evaluating the Importance of Innate Immunity**:
- Innate immunity provides immediate defense against infections through physical barriers (like skin), physiological barriers (like stomach acid), and cellular responses (like leukocytes).
- This type of immunity is crucial for newborns as their adaptive immune system is not fully developed, making them more vulnerable to infections.

3. **Understanding the Reason**:
- The reason states that "Innate immunity is also called congenital immunity and protects newborns since birth."
- Congenital immunity refers to the natural immunity that an individual is born with, which includes innate immune responses.

4. **Evaluating the Reason**:
- The statement about congenital immunity being synonymous with innate immunity is accurate.
- It emphasizes that innate immunity is the first defense mechanism available to newborns immediately after birth.

5. **Conclusion**:
- Both the assertion and the reason are true statements.
- The reason correctly explains the assertion, as it clarifies why innate immunity is significant during early life years.

6. **Final Answer**:
- The correct answer is Option 1: Both assertion and reason are true, and the reason is the correct explanation of the assertion.