The structure of the product formed in the re | vedclass

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(D) The given reaction is a pinacol-pinacolone rearrangement. $1$. Protonation of one of the hydroxyl groups occurs,followed by the loss of a water mo

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(D) The given reaction is a pinacol-pinacolone rearrangement. $1$. Protonation of one of the hydroxyl groups occurs,followed by the loss of a water molecule to form a stable carbocation. $2$. $A$ ring expansion occurs where one of the cyclopentyl rings expands to form a cyclohexyl ring,resulting in a more stable carbocation. $3$. Finally,the loss of a proton from the remaining hydroxyl group leads to the formation of a ketone,which is spiro[$4.5$]decan$-6-$one.

The structure of the product formed in the reaction given below is:

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