Assertion :- (A) Graphite is good conductor of electricity however diamond belongs to the category of insulators .
Rason (R ) Grapite is soft in anture on the hand diamond is very hard and brittle.

Options

A. Assertion and reason both are corrent statements and reason is correct explanation for assertion.
B. Assertion and reason both are corrent statements but reason is not correct explanation for assertion.
C. Assertion is corrent statement but reason reason is wrong statement.
D. Assertion is wrong statement but reason is correct statement.

Explanation

To solve the question regarding the assertion and reason about graphite and diamond, we will analyze both the assertion and the reason step by step.

### Step 1: Analyze the Assertion
**Assertion (A)**: Graphite is a good conductor of electricity; however, diamond belongs to the category of insulators.

- **Explanation**: Graphite is composed of carbon atoms arranged in a hexagonal lattice structure. In this structure, each carbon atom is bonded to three other carbon atoms, forming layers. The fourth bond of each carbon atom is a weak van der Waals bond that allows layers to slide over each other. This structure allows for the delocalization of electrons, making graphite a good conductor of electricity. In contrast, diamond has a tetrahedral structure where each carbon atom is covalently bonded to four other carbon atoms. This strong bonding does not allow for free movement of electrons, making diamond an insulator.

**Conclusion**: The assertion is true.

### Step 2: Analyze the Reason
**Reason (R)**: Graphite is soft in nature; on the other hand, diamond is very hard and brittle.

- **Explanation**: The softness of graphite is due to the weak van der Waals forces between the layers of carbon atoms, which allows them to slide over each other easily. This property makes graphite soft and lubricating. Conversely, diamond is extremely hard due to the strong covalent bonds between all four neighboring carbon atoms in its structure, which makes it very rigid and brittle.

**Conclusion**: The reason is also true.

### Step 3: Determine the Relationship
- Both the assertion and the reason are true statements. However, they are independent of each other. The reason does not explain the assertion; rather, they describe different properties of graphite and diamond.

### Final Conclusion
Both the assertion and the reason are true, but they are independent statements. Therefore, the correct answer is that both the assertion and reason are true, but the reason does not explain the assertion.

### Answer:
**Assertion is true and Reason is true, but Reason is not the explanation for Assertion.**