Which of the following is/are correct :

Options

A.
B.
C.
D.

Answer

To determine which of the given statements about the compounds are correct, we need to analyze each statement based on the principles of aromaticity, anti-aromaticity, and non-aromaticity.

### Step-by-Step Solution:

1. **Understanding Aromaticity**:
- Aromatic compounds must satisfy Huckel's rule, which states they should have \(4n + 2\) π electrons (where n is a non-negative integer).
- They must also be cyclic, planar, and fully conjugated.

2. **Understanding Anti-aromaticity**:
- Anti-aromatic compounds have \(4n\) π electrons.
- Similar to aromatic compounds, they must also be cyclic, planar, and fully conjugated.

3. **Understanding Non-aromaticity**:
- Non-aromatic compounds do not meet the criteria for aromaticity or anti-aromaticity. They may be non-planar or not fully conjugated.

4. **Analyzing the First Statement**:
- The compound is said to be anti-aromatic. However, if the compound is non-planar (like a tub-like structure), it cannot be anti-aromatic. Therefore, this statement is incorrect.

5. **Analyzing the Second Statement**:
- If a double bond is broken, and the resulting structure has 2 π electrons, it can be classified as aromatic if it follows the \(4n + 2\) rule. This statement is correct.

6. **Analyzing the Third Statement**:
- If we introduce charges that result in a 4 π electron system, it will be classified as anti-aromatic. Therefore, this statement is incorrect.

7. **Analyzing the Fourth Statement**:
- If the structure has 6 π electrons and meets the criteria for aromaticity, this statement is correct.

### Conclusion:
The correct statements are those that indicate the compound is aromatic when it has 6 π electrons and non-aromatic when it is non-planar. Thus, the correct options are **B and D**.

### Final Answer:
The correct options are **B and D**.

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