how many of the following species are ar...

how many of the following species are aromatic in nature cyclopentadienyl cation, cyclopentadienyl anion, tropylium cation, azulene, cyclopropenyl cation, tetrahydrofuran, cyclooctatetraene, furan , cycloheptatriene

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The correct Answer is:

5

Cyclopentadienyl anion, tropylium cation, azulene, cyclopropenyl cation, furan.

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