Match the following :
`{:("List - I","List - II"),((A) CH_(3)-CH(OH)-CHO,"(p) Carbohydrate"),((B) HOCH_(2)-CH(OH).CHO,"(q) Amino acid"),((C ) CH_(3)-CH(NH_(2)).COOH,"(r ) Positive Tollen's test"),((D) Ph.CH(CH_(2)NH_(2)).COOH,"(s) Ninhydrin test"):}`

Explanation

To solve the matching question, we will analyze each compound in List I and determine which description in List II corresponds to it.

### Step-by-Step Solution:

1. **Identify Compound A: CH₃-CH(OH)-CHO**
- This compound has a carbon chain with an aldehyde group (CHO) and a hydroxyl group (OH).
- Aldehydes give a positive Tollen's test, which is used to detect aldehydes.
- **Match:** A corresponds to (r) Positive Tollen's test.

2. **Identify Compound B: HOCH₂-CH(OH)-CHO**
- This compound is glyceraldehyde, which is a carbohydrate with an aldehyde group.
- It can also give a positive Tollen's test due to the presence of the aldehyde.
- **Match:** B corresponds to (p) Carbohydrate.

3. **Identify Compound C: CH₃-CH(NH₂)-COOH**
- This compound is alanine, which is an amino acid.
- Amino acids give a positive ninhydrin test, resulting in a purple coloration.
- **Match:** C corresponds to (q) Amino acid and (s) Ninhydrin test.

4. **Identify Compound D: Ph-CH(CH₂NH₂)-COOH**
- This compound also contains an amino group (NH₂) and a carboxylic acid group (COOH), making it another amino acid.
- Like alanine, it will also give a positive ninhydrin test.
- **Match:** D corresponds to (q) Amino acid and (s) Ninhydrin test.

### Final Matches:
- A → (r) Positive Tollen's test
- B → (p) Carbohydrate
- C → (q) Amino acid and (s) Ninhydrin test
- D → (q) Amino acid and (s) Ninhydrin test

### Summary of Matches:
- A → R
- B → P
- C → Q, S
- D → Q, S