Match the column :
`{:(,"Column I",,"Column II"),(A.,"Acidic",1.,"Valine"),(B.,"Basic",2.,"Lysine"),(C.,"Neural",3,"Glutamic acid"),(D.,"Aromatic",4.,"Phenylalanine"):}`

Options

A. A - 3, B - 2 , C - 1 , D - 4
B. A - 2, B - 3 , C - 4 , D - 1
C. A - 4, B - 1 , C - 2 , D - 3
D. A - 1, B - 2 , C - 3 , D - 4

Answer

To solve the matching question, we need to identify the correct pairs of amino acid classifications from Column I with the corresponding amino acids in Column II. Here’s the step-by-step breakdown:

### Step 1: Identify the Classifications
- Column I contains four classifications of amino acids:
- A. Acidic
- B. Basic
- C. Neutral
- D. Aromatic

### Step 2: Identify the Amino Acids
- Column II lists the following amino acids:
- 1. Valine
- 2. Lysine
- 3. Glutamic acid
- 4. Phenylalanine

### Step 3: Match Acidic Amino Acids
- Acidic amino acids are characterized by having a carboxyl group in their side chain. The common acidic amino acids are aspartic acid and glutamic acid.
- **Match A (Acidic)**: The amino acid that is acidic is **Glutamic acid (3)**.

### Step 4: Match Basic Amino Acids
- Basic amino acids have side chains that contain an amino group. Common basic amino acids include lysine, arginine, and histidine.
- **Match B (Basic)**: The amino acid that is basic is **Lysine (2)**.

### Step 5: Match Neutral Amino Acids
- Neutral amino acids do not have a charge at physiological pH. Valine is one of the neutral amino acids.
- **Match C (Neutral)**: The amino acid that is neutral is **Valine (1)**.

### Step 6: Match Aromatic Amino Acids
- Aromatic amino acids contain an aromatic ring in their structure. Phenylalanine is a well-known aromatic amino acid.
- **Match D (Aromatic)**: The amino acid that is aromatic is **Phenylalanine (4)**.

### Final Matches
Now we can summarize the matches:
- A (Acidic) → 3 (Glutamic acid)
- B (Basic) → 2 (Lysine)
- C (Neutral) → 1 (Valine)
- D (Aromatic) → 4 (Phenylalanine)

### Conclusion
The correct matching is:
- A → 3
- B → 2
- C → 1
- D → 4

### Answer
The correct option is: **A 3, B 2, C 1, D 4.**

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