Which of the following compounds decolourise `Br_(2)-H_(2)O` and also give positive test with neutral `FeCl_(3)` :

Options

A.
B.
C.
D.

Explanation

To solve the question of which compound decolorizes `Br₂-H₂O` and also gives a positive test with neutral `FeCl₃`, we can follow these steps:

### Step 1: Understand the Tests
1. **Bromine Water Test**: This test is used to identify unsaturation in organic compounds. If a compound decolorizes bromine water, it indicates the presence of double or triple bonds (alkenes or alkynes).

2. **Neutral FeCl₃ Test**: This test is used to identify phenolic compounds. A positive test indicates the presence of a phenolic hydroxyl group (-OH) attached to a benzene ring.

### Step 2: Analyze the Compounds
We need to evaluate each compound provided in the options to see if they meet both criteria.

1. **Check for Unsaturation**: Look for double or triple bonds in the structure of each compound.
2. **Check for Phenolic Structure**: Determine if there is a benzene ring with a hydroxyl (-OH) group.

### Step 3: Evaluate Each Option
- **Option A**: Check if it has unsaturation and a phenolic group.
- **Option B**: Check for the same as above.
- **Option C**: Again, check for unsaturation and a phenolic group.
- **Option D**: Check if it has both characteristics.

### Step 4: Identify the Correct Option
After evaluating all options:
- The compound that shows both decolorization of bromine water (indicating unsaturation) and a positive test with neutral FeCl₃ (indicating a phenolic structure) is the correct answer.

In this case, **Option D** is identified as the correct option, as it contains both the unsaturation and the phenolic group.

### Final Conclusion
The compound that decolorizes `Br₂-H₂O` and gives a positive test with neutral `FeCl₃` is **Option D**.

---