Assertion A molecule containing chiral carbon must be non-superimposable on its mirror image. ltbr. Reason A chiral carbon is bonded to four different atoms or groups.

Options

A. Both assertion and reason are correct and reason is the correct explanation of the assertion.
B. Both assertion and reason are correct and reason is not the correct explanation of the assertion.
C. Assertion is correct but reason is incorrect
D. Assertion is incorrect but reason is correct

Answer

To analyze the assertion and reason provided in the question, we need to break down the statements and evaluate their validity step by step.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "A molecule containing chiral carbon must be non-superimposable on its mirror image."
- A chiral carbon is defined as a carbon atom that is bonded to four different atoms or groups.

2. **Evaluating the Assertion**:
- The assertion is generally true for most chiral molecules. However, there are exceptions. For example, certain molecules may have chiral centers but can still be superimposable due to symmetry (like meso compounds).
- Therefore, the assertion is **not universally true**.

3. **Understanding the Reason**:
- The reason states that "A chiral carbon is bonded to four different atoms or groups."
- This statement is correct as it accurately describes the definition of a chiral carbon.

4. **Linking Assertion and Reason**:
- While the reason is correct, it does not adequately explain the assertion. The assertion claims that all chiral carbon-containing molecules must be non-superimposable, which is not always the case. Thus, the reason does not provide a justification for the assertion.

5. **Conclusion**:
- The assertion is **incorrect** because there are exceptions (e.g., meso compounds).
- The reason is **correct** as it accurately defines a chiral carbon.
- The reason does **not explain** the assertion.

### Final Answer:
- Assertion: Incorrect
- Reason: Correct
- The reason does not explain the assertion.