Assertion : Millon's test is on test for the identification of proteins.
Reason : Millon's reagent is a solution of mercurous nitrate and mercuric in nitric acid containing a little nitrous acid.

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.

Explanation

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

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "Millon's test is a test for the identification of proteins."
- This is indeed true. Millon's test is specifically used to detect phenolic compounds, particularly tyrosine, which is an amino acid found in proteins.

2. **Understanding the Reason**:
- The reason states that "Millon's reagent is a solution of mercurous nitrate and mercuric nitrate in nitric acid containing a little nitrous acid."
- This statement is also true. Millon's reagent is composed of mercurous nitrate (Hg2(NO3)2) and mercuric nitrate (Hg(NO3)2) dissolved in nitric acid, with a small amount of nitrous acid.

3. **Evaluating the Relationship**:
- While both the assertion and the reason are true, we need to determine if the reason provides a correct explanation for the assertion.
- The assertion talks about the identification of proteins, while the reason describes the composition of Millon's reagent. The reason does not explain how Millon's test identifies proteins.

4. **Conclusion**:
- Since both the assertion and reason are true, but the reason does not explain the assertion, we conclude that:
- Assertion is true.
- Reason is true, but it is not the correct explanation of the assertion.

### Final Answer:
Both assertion and reason are true, but reason is not the correct explanation of assertion.