Assertion. Benzene does not decolourize `Br_2`- water
Reason. Benzene is stabilized by resonance due to delocalization of `pi`-electrons.

Options

A. If both assertion and reason are true, and reason is the true explanation of the assertion.
B. If both assertion and reason are true, but reason is not the true explanation of the assertion.
C. If assertion is true, but reason is false.
D. If both assertion and reason are false

Answer

To solve the question regarding the assertion and reason about benzene and its interaction with bromine water, we can break it down step by step.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "Benzene does not decolorize Br₂-water."
- This means that benzene does not react with bromine water to change its color, which is an indication of a chemical reaction occurring.

2. **Understanding Bromine Water**:
- Bromine water is a solution of bromine (Br₂) in water, which has a reddish-brown color. When a substance decolorizes bromine water, it indicates that the substance has reacted with bromine, leading to a loss of color.

3. **Analyzing Benzene**:
- Benzene (C₆H₆) is an aromatic hydrocarbon known for its stability due to resonance. This means that the π-electrons in benzene are delocalized over the ring structure, creating a stable configuration.

4. **Reasoning Behind the Assertion**:
- The reason states that "Benzene is stabilized by resonance due to delocalization of π-electrons."
- This delocalization of electrons makes benzene less reactive towards electrophilic addition reactions, such as the one that would occur with bromine.

5. **Conclusion**:
- Since benzene does not react with bromine water, the assertion is true.
- The reason provided correctly explains why benzene does not react with bromine water, as its stability due to resonance prevents such reactions.
- Therefore, both the assertion and the reason are true, and the reason is the correct explanation of the assertion.

### Final Answer:
- **Assertion**: True
- **Reason**: True
- **Explanation**: The reason is a correct explanation of the assertion.