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 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 reasonb is false
D. If both assertion and reason are false.

Explanation

To solve the assertion and reason question regarding alpha amino acids, we will break down the statements and analyze them step by step.

### Step 1: Understanding the Assertion
The assertion states that alpha-amino acids exist as internal salts in solution due to the proximity of amino (-NH2) and carboxylic acid (-COOH) groups.

**Explanation:**
- Alpha-amino acids have both an amino group and a carboxylic acid group attached to the same carbon atom (the alpha carbon).
- In an aqueous solution, these groups can interact with each other, leading to the formation of a zwitterion.

**Hint:** Consider how the structure of alpha-amino acids allows for interactions between functional groups.

### Step 2: Understanding the Reason
The reason states that the H⁺ ion from the carboxylic group is captured by the amino group, which has a lone pair of electrons.

**Explanation:**
- The carboxylic acid group can donate a proton (H⁺), resulting in a negatively charged carboxylate ion (-COO⁻).
- The amino group, which has a lone pair of electrons, can accept this proton, becoming positively charged (-NH3⁺).
- This proton transfer leads to the formation of a zwitterion, which is a molecule with both positive and negative charges but is overall neutral.

**Hint:** Think about the acid-base reaction occurring between the carboxylic acid and the amino group.

### Step 3: Conclusion
Both the assertion and the reason are true. The reason provided correctly explains why alpha-amino acids exist as internal salts (zwitterions) in solution.

### Final Answer
- **Assertion:** True
- **Reason:** True
- **Explanation:** The reason is a correct explanation of the assertion.

### Summary of Steps:
1. Identify the structure of alpha-amino acids and their functional groups.
2. Explain the interaction between the amino and carboxylic acid groups in solution.
3. Discuss the proton transfer process that leads to the formation of zwitterions.
4. Conclude that both statements are true and that the reason supports the assertion.