Chemistry Question from JEE Main 2025 · 24 January, Shift 1

Aman has been asked to synthesise the molecule $x$, 1-(cyclopent-1-en-1-yl)ethan-1-one, in which an acetyl group $-CO-CH_3$ is attached to C-1 of cyclopentene. He thought of preparing the molecule using an aldol condensation reaction. He found a few cyclic alkenes in his laboratory. He thought of performing an ozonolysis reaction on an alkene to produce a dicarbonyl compound, followed by an aldol reaction to prepare $x$. Predict the suitable alkene that can lead to the formation of $x$.