Assertion: Graphite is an element.
Reason: Element is the pure form of a substance containing same kind of atoms.

Options

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

Answer

To solve the question, we need to analyze both the assertion and the reason provided.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "Graphite is an element."
- Graphite is indeed a form of carbon, which is an element. Therefore, this assertion is true.

2. **Understanding the Reason**:
- The reason states that "An element is the pure form of a substance containing the same kind of atoms."
- This definition is accurate. An element consists of only one type of atom, and thus it is a pure substance.

3. **Connecting Assertion and Reason**:
- Since graphite is a pure form of carbon and contains only carbon atoms, it fits the definition of an element.
- Therefore, the reason correctly explains why the assertion is true.

4. **Conclusion**:
- Both the assertion and the reason are true, and the reason provides a correct explanation for the assertion.

5. **Final Answer**:
- The correct option is that both the assertion and the reason are true, and the reason is the correct explanation for the assertion.