Assertion: Colostrum is a very efficient means of transferring immunity to a newborn
Reason: IgM from mother's milk protects the baby from the respiratory infection usually affecting in young age.

Options

A. If both assertion and reason are true and 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

Answer

To analyze the assertion and reason provided in the question, let's break it down step by step:

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "Colostrum is a very efficient means of transferring immunity to a newborn."
- Colostrum is the first milk produced by a mother after childbirth and is rich in antibodies.

2. **Understanding the Reason**:
- The reason given is that "IgM from mother's milk protects the baby from respiratory infections usually affecting young age."
- It's important to note that while maternal milk does provide immunity, the specific antibody mentioned (IgM) is not the primary antibody found in colostrum.

3. **Identifying the Key Components**:
- Colostrum contains high levels of immunoglobulin A (IgA), which plays a crucial role in mucosal immunity, particularly in protecting against oral and nasal pathogens.
- IgM is not the primary antibody in colostrum; thus, the reason provided is incorrect.

4. **Conclusion**:
- The assertion is true because colostrum does effectively transfer immunity to newborns.
- The reason is false because it incorrectly identifies IgM as the protective antibody instead of IgA.

5. **Final Answer**:
- The assertion is true, but the reason is false. Therefore, the best match is that the assertion is correct while the reason is incorrect.