Assertion `:` Alpha`(alpha)-` amino acids exist as internal salt in solution as they have amino and carboxylic acid groups in near vicinity.
Reason`:H^(+)` ion given by carboyxylic group `(-COOH)` is captured by amino group `(-NH_(2))` having lone pair of electrons.

Options

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

Explanation

To solve the question, we need to analyze the assertion and reason provided regarding alpha-amino acids.

### Step-by-Step Solution:

1. **Understanding Alpha-Amino Acids**:
- Alpha-amino acids are organic compounds that contain both an amino group (-NH2) and a carboxylic acid group (-COOH) attached to the same carbon atom (the alpha carbon).
- The general structure of an alpha-amino acid can be represented as:
\[ \text{R} - \text{C}(\text{NH}_2)(\text{COOH}) - \text{H} \]
- Here, R represents a side chain that varies between different amino acids.

2. **Formation of Zwitterion**:
- In solution, alpha-amino acids can exist as zwitterions. A zwitterion is a molecule that has both positive and negative charges but is overall electrically neutral.
- The carboxylic acid group can donate a proton (H+) to the solution, resulting in a negatively charged carboxylate ion (-COO^-).
- The amino group can accept this proton, becoming positively charged (-NH3^+).

3. **Internal Salt Formation**:
- The assertion states that alpha-amino acids exist as internal salts in solution due to the proximity of the amino and carboxylic acid groups.
- Since the amino group can accept a proton from the carboxylic acid group, this creates a balance of charges within the molecule, leading to the formation of a zwitterion.
- This internal salt formation is a characteristic feature of alpha-amino acids.

4. **Role of Proton Transfer**:
- The reason provided states that the H+ ion from the carboxylic acid group is captured by the amino group.
- This is accurate because the lone pair of electrons on the nitrogen atom of the amino group allows it to accept the proton, resulting in the zwitterionic form.

5. **Conclusion**:
- Both the assertion and reason are true. The assertion correctly describes the behavior of alpha-amino acids in solution, and the reason provides a valid explanation for this behavior.

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

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