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Hex-4-ene-2-ol on treatment with PCC gives ‘A’ on reaction with sodium hypoiodite gives ‘B’, which on further heating with soda lime gives ‘C’. The compound ‘C’ is

1. 2-pentene
2. Proponaldehyde
3. 2-butene
4. 4-methylpent-2-ene

Correct answer: 2-butene

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