(A): Tropylium cation is aromatic in nature
(R): The only property that determines its aromatic behaviour is its planar structure.

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Both (A) and (R) are false

Both (A) and (R) are true and (R) is not the correct explanation of (A)

Both (A) and (R) are true and (R) is the correct explanation of (A)

(A) is true but (R) is false

answer is C.

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Detailed Solution

Tropylium cation has ${sp}^{2}$ carbons in its ring. It also has 6 $π$ electrons, participating in delocalization and follows (4n+2) $π$ electrons rule(Huckel's rule. It is a planar molecule. Thus, all these four factors are essential for a compound to be aromatic. Hence, the assertion(A) is true and the Reason(R) is false.

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