Which of the following molecule has non-superimposible mirror images ?

Options

A.
B.
C.
D.

Answer

To determine which molecule has non-superimposable mirror images, we need to identify the chiral molecule among the given options. A chiral molecule is one that has a carbon atom bonded to four different groups, leading to non-superimposable mirror images.

### Step-by-Step Solution:

1. **Understand Chirality**:
- A molecule is chiral if it has a chiral center (usually a carbon atom) that is bonded to four different substituents. This results in two distinct forms (enantiomers) that are non-superimposable mirror images of each other.

2. **Examine Each Option**:
- **Option A**: Check the substituents on the carbon atom.
- If there are two identical groups (e.g., two methyl groups), the molecule is not chiral.
- **Option B**: Similarly, check for identical groups.
- If there are two identical groups (e.g., two ethyl groups), the molecule is not chiral.
- **Option C**: Check the substituents on the carbon atom.
- If the carbon is attached to four different groups (e.g., methyl, hydrogen, deuterium, bromine), the molecule is chiral.
- **Option D**: Check for identical groups.
- If there are two identical groups (e.g., two ethyl groups), the molecule is not chiral.

3. **Identify the Chiral Molecule**:
- After examining all options, identify which one has a carbon atom bonded to four different groups.
- In this case, **Option C** has a chiral carbon atom with four different substituents.

4. **Conclusion**:
- The molecule from **Option C** is chiral and has non-superimposable mirror images.

### Final Answer:
**Option C** is the molecule that has non-superimposable mirror images.