Which of the following pairs of compound is/are identical ?

Options

A.
B.
C.
D.

Answer

To determine which pairs of compounds are identical, we need to analyze the provided options carefully. Here’s a step-by-step solution:

### Step 1: Understand the Concept of Identical Compounds
Identical compounds are those that have the same molecular formula and the same structural arrangement of atoms. They can be superimposed on each other, meaning they are the same compound in different representations.

### Step 2: Analyze Each Pair of Compounds
We will examine the pairs of compounds given in the options to see if they can be superimposed on each other.

### Step 3: Examine Option A
1. **Identify the Structure**: The first compound in option A has a carbon (C) connected to a methyl group (CH3) and a hydrogen (H). The second compound also has a similar arrangement.
2. **Count the Carbons**: Both compounds have a long chain of 4 carbons.
3. **Check Substituents**: Both compounds have chlorine (Cl) and hydrogen (H) at the same positions on the carbon chain.
4. **Superimposition**: If we interchange the positions of CH3 and Cl, we can see that they can be arranged to be identical.

### Step 4: Conclusion for Option A
Since both compounds can be arranged to look exactly the same, we conclude that the compounds in option A are identical.

### Step 5: Check Other Options (if provided)
If there are other options (B, C, D), repeat the same analysis to determine if they are identical or not. However, based on the provided information, we focus on option A.

### Final Answer
The pair of compounds in option A is identical.

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