`{:(,"List-I",,"List-II"),((P),R-X+R-ONararrR-O-R,(1),"Conant-Finkelstein reaction"),((Q),R-Cl+KlrarrRl,(2),"Williamsons synthesis"),((R),R-OHoverset(SOCl_(2))rarrR-Cl,(3),"Wurtz-Fittig reaction"),((S),C_(6)H_(5)-X+R-Xoverset(Na)rarrC_(6)H_(5)-R,(4),"Darzen's reaction"):}`

Options

A. `{:("P","Q","R","S"),(3,4,1,2):}`
B. `{:("P","Q","R","S"),(2,4,1,3):}`
C. `{:("P","Q","R","S"),(2,1,4,3):}`
D. `{:("P","Q","R","S"),(3,1,4,2):}`

Answer

To solve the matching question between List-I and List-II, we need to identify the correct reaction associated with each compound in List-I. Let's go through each item step by step.

### Step-by-Step Solution:

1. **Identify Reaction P: R-X + R-ONa → R-O-R**
- This reaction involves the formation of an ether from an alkyl halide and an alkoxide. This is characteristic of **Williamson's synthesis**.
- **Match:** P → (2) Williamson's synthesis

2. **Identify Reaction Q: R-Cl + K → R-I**
- This reaction describes the exchange of halogen atoms, where one halogen (Cl) is replaced by another (I) using potassium. This is known as the **Conant-Finkelstein reaction**.
- **Match:** Q → (1) Conant-Finkelstein reaction

3. **Identify Reaction R: R-OH ⟶ (SOCl2) → R-Cl**
- This reaction involves converting an alcohol (R-OH) into an alkyl halide (R-Cl) using thionyl chloride (SOCl2). This is known as **Darzen's reaction**.
- **Match:** R → (4) Darzen's reaction

4. **Identify Reaction S: C6H5-X + R-X ⟶ (Na) → C6H5-R**
- This reaction involves the coupling of an aryl halide (C6H5-X) with an alkyl halide (R-X) in the presence of sodium to form an alkyl aryl compound. This is characteristic of the **Wurtz-Fittig reaction**.
- **Match:** S → (3) Wurtz-Fittig reaction

### Final Matches:
- P → (2) Williamson's synthesis
- Q → (1) Conant-Finkelstein reaction
- R → (4) Darzen's reaction
- S → (3) Wurtz-Fittig reaction

### Conclusion:
The correct matches are:
- P - 2
- Q - 1
- R - 4
- S - 3