Chemistry - GOC Question with Solution | TestHub

Carbocation stability depends on +I effect, hyperconjugation, and resonance.

Electron-donating groups like alkyl (+I) increase stability, while electron-withdrawing decrease it.

In options (A), (B), and (C), the positive charge is not effectively stabilized by the –OH group.

The –OH group shows –I effect but can give stabilization only when directly involved via resonance.

In option (D), the carbocation is adjacent to –OH group, allowing lone pair donation (+M effect).

This leads to resonance stabilization between oxygen and carbocation center.

Also, alkyl groups provide additional hyperconjugation support.

Hence, option (D) is the most stable carbocation.