Which of the following will not show geometrical isomerism?

Options

A.
B.
C.
D.

Explanation

To determine which of the following compounds will not show geometrical isomerism, we need to understand the conditions required for geometrical isomerism to occur.

### Step-by-Step Solution:

1. **Understanding Geometrical Isomerism**:
- Geometrical isomerism occurs in compounds that have restricted rotation around a double bond or a ring structure.
- For geometrical isomers to exist, there must be two different groups attached to each carbon involved in the double bond or ring.

2. **Identifying the Compounds**:
- Let's consider the compounds given in the question (though they are not listed here, we will assume some common examples).
- For each compound, we will analyze the substituents around the double bond or ring.

3. **Analyzing Each Compound**:
- **Compound A**: If it has two different groups on one carbon and two different groups on the other carbon, it can show geometrical isomerism.
- **Compound B**: Similar analysis as Compound A. If it has different groups on both carbons, it can show isomerism.
- **Compound C**: If it has identical groups on one of the carbons, it cannot show geometrical isomerism.
- **Compound D**: If it has different groups on both carbons, it can show isomerism.

4. **Conclusion**:
- After analyzing the compounds, the one that has identical groups on one of the carbons (like two -CH3 groups on one carbon) will not show geometrical isomerism.
- Therefore, the correct answer is the compound that has identical groups on one side.

### Final Answer:
The compound that will not show geometrical isomerism is the one with identical groups on one of the carbons.

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