Which of the following has plane of symmetry:-

Options

A.
B.
C.
D. ALL

Answer

To determine which of the given structures has a plane of symmetry, we need to understand what a plane of symmetry is. A plane of symmetry is an imaginary plane that divides an object into two identical halves that are mirror images of each other.

### Step-by-Step Solution:

1. **Identify the Structures**:
- We need to analyze the given structures one by one to check for symmetry.
- Let's denote the first structure as Structure A, the second as Structure B, and so on.

2. **Analyze Structure A (C=C=C with CH3 and H)**:
- The structure is a linear arrangement of carbon atoms with a double bond and substituents (CH3 and H).
- If we visualize or draw this structure, we can see that if we slice it down the middle (between the two carbon atoms), the left side will have CH3 and H, while the right side will also have CH3 and H.
- This means that the two halves are mirror images of each other.

3. **Conclusion for Structure A**:
- Since Structure A can be divided into two identical halves, it has a plane of symmetry.

4. **Analyze Other Structures (B, C, D)**:
- Without specific details about Structures B, C, and D, we can’t analyze them directly. However, if they do not exhibit similar symmetry (like having identical substituents on either side of a central axis), they likely do not have a plane of symmetry.

5. **Final Answer**:
- Based on the analysis of Structure A, we conclude that it has a plane of symmetry. If Structures B, C, and D do not exhibit similar symmetrical properties, then the answer is Structure A.