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Which of the following is correct regarding aromatic nature?
a) Benzene
b) Cyclopropenyl anion
c) Cyclopentadienyl cation
d) Cycloheptatrienyl anion

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A, B, C and D

A only

A, B and C

A, B and D

answer is C.

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Detailed Solution

Benzene is an aromatic molecule due to its delocalized pi electron system.

Cyclopropenyl anion and Cyclopentadienyl cation are also aromatic due to the presence of 4n+2 electrons in their pi systems.

Cycloheptatrienyl anion is not aromatic because it has 4n electrons in its pi system.

Hence, the correct option is C) A, B and C

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