The geometrical isomerism is shown by:

Options

A.
B.
C.
D.

Answer

To determine which compound shows geometrical isomerism, we can follow these steps:

### Step 1: Understand Geometrical Isomerism
Geometrical isomerism occurs in compounds that have a double bond (C=C) or a ring structure, where the arrangement of groups around the double bond or ring can differ. This results in different spatial arrangements of the atoms or groups.

### Step 2: Identify the Conditions for Geometrical Isomerism
For a compound to exhibit geometrical isomerism, it must have:
- A carbon-carbon double bond or a cyclic structure.
- Two different groups attached to each carbon atom involved in the double bond.

### Step 3: Analyze the Given Compounds
We need to analyze each of the provided compounds to see if they meet the criteria for geometrical isomerism:
- **Compound A**: Check if it has a double bond and different groups.
- **Compound B**: Check if it has a double bond and different groups.
- **Compound C**: Check if it has a double bond and different groups. Note if it has a plane of symmetry.
- **Compound D**: Check if it has a double bond and different groups. Note if it has a plane of symmetry.

### Step 4: Determine Which Compounds Show Geometrical Isomerism
- **Compound A**: If it has a double bond and different groups, it shows geometrical isomerism.
- **Compound B**: If it has a double bond and different groups, it shows geometrical isomerism.
- **Compound C**: If it has a plane of symmetry, it does not show geometrical isomerism.
- **Compound D**: If it has no plane of symmetry and has a double bond with different groups, it shows geometrical isomerism.

### Step 5: Conclusion
After analyzing the compounds, we conclude that **Compound D** shows geometrical isomerism because it lacks a plane of symmetry and has a double bond with different groups attached.

### Final Answer
The geometrical isomerism is shown by **Compound D**.

---