4
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Since cyclopropyl methyl cation is highly stable, I proceeded through SN1 as elimination is not possible because of strain in the ring. Need help now in approaching the question.

Actually the given answer is 2, but I am getting no π bonds.

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    $\begingroup$ The cation created by SN1 is highly hindered for approach by the piperidine. Consider the possibility of nucleophilic attack at one of the methylenes of the [3] ring followed by ring opening. $\endgroup$
    – Waylander
    Jul 31 '21 at 9:27

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