Which of the following is not a resonance structure of the other?

Options

A.
B.
C.
D.

Answer

To determine which of the given options is not a resonance structure of the others, we need to analyze each structure and see if they can be interconverted by the movement of electrons.

### Step-by-Step Solution:

1. **Identify the Structures**:
We have four structures (let's label them as A, B, C, and D). We need to analyze these structures to see how they relate to each other.

2. **Analyze Structure A**:
- Look at the bonds and charges in Structure A.
- Check if the electrons can be shifted to form another structure that resembles B, C, or D.

3. **Analyze Structure B**:
- Examine the bonds and charges in Structure B.
- Attempt to shift electrons to see if it can form Structure A, C, or D.

4. **Analyze Structure C**:
- Review the bonds and charges in Structure C.
- Shift electrons and check if it can be converted into A, B, or D.

5. **Analyze Structure D**:
- Look at the bonds and charges in Structure D.
- Attempt to shift electrons to see if it can be converted into A, B, or C.

6. **Determine Resonance Structures**:
- After analyzing all structures, identify which three can be interconverted through electron movement.
- The structure that cannot be converted into the others is the one that is not a resonance structure.

7. **Conclusion**:
- Based on the analysis, identify the structure that does not fit the criteria of resonance with the others. This structure is the answer to the question.

### Final Answer:
- The structure that is not a resonance structure of the others is **Option D**.