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(B) The reaction involves the acid-catalyzed dehydration of cyclopentylmethanol. $1$. Protonation of the hydroxyl group occurs to form a good leaving

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Cyclohexene

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(B) The reaction involves the acid-catalyzed dehydration of cyclopentylmethanol. $1$. Protonation of the hydroxyl group occurs to form a good leaving group $(-OH_2^+)$. $2$. Loss of water generates a primary carbocation. $3$. This primary carbocation undergoes a ring expansion rearrangement to form a more stable six-membered cyclohexyl carbocation. $4$. Finally,deprotonation occurs to form the most stable alkene,which is cyclohexene.

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