Assertion : Each antibody is represented as `H_(2)L_(2)`
Reason : Each antibody molecule has four nucleotide chains two small celled light chains and two longer called heavy chains

Options

A. If both assertion 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 but reason is false.
D. If both assertion and reason are false.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Assertion**: The assertion states that each antibody is represented as H2L2. This notation indicates the structure of an antibody molecule, which consists of two heavy chains (H) and two light chains (L).

2. **Understanding the Reason**: The reason provided states that each antibody molecule has four peptide chains: two light chains (which are shorter) and two heavy chains (which are longer). This is a correct description of the structure of antibodies.

3. **Analyzing the Relationship**: The assertion (H2L2) is a representation of the structure of antibodies, while the reason explains why this representation is used. Since the reason accurately describes the structure that leads to the assertion, it serves as a valid explanation.

4. **Conclusion**: Both the assertion and the reason are true, and the reason correctly explains the assertion. Therefore, the correct answer is that both the assertion and the reason are true, and the reason is the correct explanation of the assertion.

**Final Answer**: Both the assertion and the reason are true, and the reason is the correct explanation of the assertion.

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