`{:(,"List-I",,"List-II"),((P),"Wood spirit",(1),"Ethyl alcohol"),((Q),"Absolute alcohol",(2),"Methyl alcohol"),((R),"Glycerine",(3),"1,2-Dihydroxy ethane"),((S),"Glycerol",(4),"1,2,3-Trihydroxy propane"):}`

Options

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

Answer

To solve the problem of matching the common names of alcohols and their corresponding chemical names, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Common Names**:
- We have four common names: Wood Spirit, Absolute Alcohol, Glycerine, and Glycerol.

2. **Match Wood Spirit**:
- Wood Spirit is the common name for **Methyl Alcohol** (Methanol).
- Therefore, we can match:
- **P → (2) Methyl Alcohol**

3. **Match Absolute Alcohol**:
- Absolute Alcohol is commonly known as **Ethyl Alcohol** (Ethanol).
- Thus, we can match:
- **Q → (1) Ethyl Alcohol**

4. **Match Glycerine**:
- Glycerine is also known as **Glycerol**, which is a compound with three hydroxyl groups.
- The chemical name for Glycerine is **1,2,3-Trihydroxypropane**.
- Therefore, we can match:
- **R → (4) 1,2,3-Trihydroxypropane**

5. **Match Glycerol**:
- Glycerol is the same as Glycerine and is also represented by the chemical name **1,2-Dihydroxyethane** (which is actually ethylene glycol).
- However, since we have already matched Glycerine, we can conclude:
- **S → (3) 1,2-Dihydroxyethane**

### Final Matches:
- P → (2) Methyl Alcohol
- Q → (1) Ethyl Alcohol
- R → (4) 1,2,3-Trihydroxypropane
- S → (3) 1,2-Dihydroxyethane

### Answer:
The correct matching is:
- P = 2
- Q = 1
- R = 4
- S = 3

Thus, the answer is option number 3.

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