Which of the following does not react with aqueous `KMnO_(4)` ?

Options

A.
B. `F_(2)C=CF_(2)`
C.
D.

Explanation

To determine which of the given compounds does not react with aqueous KMnO4, we need to understand the nature of the compounds and the reactivity of KMnO4, also known as Baeyer's reagent, which is used to test for unsaturation (double or triple bonds) in organic compounds.

### Step-by-Step Solution:

1. **Identify the Reagents**: Aqueous KMnO4 is a strong oxidizing agent and is commonly used to test for unsaturation in organic compounds. It reacts with alkenes and alkynes, leading to the oxidation of these compounds.

2. **Understand Unsaturation**: Unsaturated compounds contain double or triple bonds. KMnO4 will react with these bonds, resulting in a color change (decolorization) as the purple color of KMnO4 fades.

3. **Analyze Each Compound**:
- **Compound A**: This is an aromatic compound. Aromatic compounds have delocalized pi electrons and do not typically react with KMnO4 in the same way that alkenes do. Therefore, it does not undergo the Baeyer's test.
- **Compound B**: This compound has a structure with a double bond between carbon atoms and is also aromatic. The delocalization of pi electrons in aromatic compounds prevents the reaction with KMnO4, similar to compound A.
- **Compound C**: This is also an aromatic compound. Like compounds A and B, it has delocalized pi electrons, which means it will not react with KMnO4.
- **Compound D**: This is a cycloalkene, which is an unsaturated compound. Cycloalkenes contain double bonds and will react with KMnO4, leading to a positive Baeyer's test.

4. **Conclusion**: Based on the analysis, compounds A, B, and C do not react with aqueous KMnO4, while compound D does react. Therefore, the compounds that do not react with aqueous KMnO4 are A, B, and C.

### Final Answer:
The compounds that do not react with aqueous KMnO4 are **A, B, and C**.