Which of the following compound is achiral ?

Options

A.
B.
C.
D.

Explanation

To determine which of the given compounds is achiral, we need to understand the concept of chirality and the presence of symmetry in molecular structures.

### Step-by-Step Solution:

1. **Understanding Chirality**:
- Chirality refers to the property of a molecule that makes it non-superimposable on its mirror image. A chiral molecule lacks a plane of symmetry.
- Achiral compounds, on the other hand, are optically inactive and possess at least one plane of symmetry, making them superimposable on their mirror images.

2. **Identifying Symmetry Elements**:
- To determine if a compound is achiral, we need to look for symmetry elements such as a plane of symmetry, center of symmetry, or axis of symmetry.
- If a compound has a plane of symmetry, it is likely to be achiral.

3. **Analyzing the Compounds**:
- Examine each compound provided in the question. For each compound, check if there is a plane of symmetry.
- For example, if a compound has identical groups on both sides of a central atom, it may have a plane of symmetry.

4. **Conclusion**:
- After analyzing the compounds, identify the one that has a plane of symmetry. This compound will be the achiral one.

### Example Analysis:
- **Compound A**: If it has four different substituents on a carbon atom, it is chiral.
- **Compound B**: If it has two identical groups on one side and two different groups on the other, it may have a plane of symmetry and could be achiral.
- **Compound C**: If it has all identical groups, it is achiral.
- **Compound D**: If it lacks symmetry and has four different substituents, it is chiral.

### Final Answer:
Based on the analysis, the compound that has a plane of symmetry is the achiral compound.

---