Which reaction condition converts cyclohexanol to cyclohexene?

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Conc. H₂SO₄ at 160°C Correct PCC in CH₂Cl₂ KMnO₄ in alkaline medium NaBH₄ in ethanol

Cyclohexanol dehydrates to cyclohexene with conc. H₂SO₄ at 160°C via an E₁ mechanism, eliminating water.

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