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Question

Which of the following will show aromatic behaviour

A
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B
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C
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D
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Solution

The correct option is B
a is non-aromatic.
b.
(1) molecule is planar
(2) 6π electrons are present, thus it follows Huckel's rule.
(3) All the atoms in the ring are in cojugation.

Hence, it is aromatic.

c is also non-aromatic.
d is also non-aromatic.

So, the answer is option (b).

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