Identify the aromatic compound ?

Options

A.
B.
C.
D.

Answer

To identify the aromatic compound among the given options, we can follow these steps:

### Step 1: Understand the Criteria for Aromaticity
A compound is considered aromatic if it meets the following criteria:
1. It must be cyclic.
2. It must be planar (or nearly planar).
3. It must have a continuous overlap of p-orbitals (conjugation).
4. It must follow Huckel's rule, which states that the compound must have (4n + 2) π electrons, where n is a non-negative integer (0, 1, 2, ...).

### Step 2: Analyze Each Option
- **Option A**: Check if it is cyclic, planar, and has conjugation. If there is a break in conjugation, it cannot be aromatic.
- **Option B**: Check for cyclic structure, planarity, and the number of π electrons. If it follows Huckel's rule, it is aromatic.
- **Option C**: Count the π electrons. If it has 4 π electrons, it is anti-aromatic, which means it cannot be aromatic.
- **Option D**: Determine if there is any conjugation. If there is none, it cannot be aromatic.

### Step 3: Identify the Correct Option
After analyzing the options:
- **Option A** is not aromatic due to broken conjugation.
- **Option C** is anti-aromatic due to having 4 π electrons.
- **Option D** lacks conjugation, making it non-aromatic.
- **Option B** has conjugation and follows Huckel's rule, making it the aromatic compound.

### Conclusion
The aromatic compound among the options is **Option B**.

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