Which of the following compounds can show Optical isomerism as well as geometrical isomerism?

Options

A.
B.
C.
D.

Answer

To determine which compounds can show both optical isomerism and geometrical isomerism, we need to analyze each compound based on the presence of chiral centers and the ability to form cis/trans isomers due to restricted rotation around double bonds.

### Step-by-Step Solution:

1. **Understand Geometrical Isomerism**:
- Geometrical isomerism occurs in compounds with a double bond (alkenes) or in cyclic compounds where the substituents can be arranged differently (cis/trans configuration).
- For alkenes, if two different groups are attached to each carbon of the double bond, cis (same side) and trans (opposite side) isomers can exist.

2. **Understand Optical Isomerism**:
- Optical isomerism occurs when a compound has a chiral center, which is a carbon atom attached to four different groups. Such compounds can rotate plane-polarized light and exist as enantiomers (non-superimposable mirror images).

3. **Analyze Each Compound**:
- **Compound 1**: Contains a double bond and a chiral carbon. This compound can exhibit both geometrical (cis/trans) and optical isomerism.
- **Compound 2**: Also has a double bond and a chiral carbon. It can show both types of isomerism.
- **Compound 3**: Similar to the previous compounds, it has a chiral carbon and can form cis/trans isomers due to the presence of a double bond. Therefore, it can exhibit both isomerisms.
- **Compound 4**: This compound has a double bond and can also have a chiral center. It can show both geometrical and optical isomerism.

4. **Conclusion**:
- All four compounds can exhibit both optical isomerism and geometrical isomerism due to the presence of chiral centers and the ability to form cis/trans isomers.

### Final Answer:
All four compounds can show optical isomerism as well as geometrical isomerism.