Chemistry - Halogen Derivative Question with Solution | TestHub

Alcoholic $\mathrm{KOH}$ gives anti-periplanar E2 elimination. In the reactive chair, axial Cl can eliminate against the adjacent ring β-H atoms or the side-chain β-H. These give the two distinct endocyclic drawings A/B and the exocyclic alkene D. C changes the methyl substituent into ethyl and is not atom-conserving.