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Identify the reagents used for the following conversion OH CHO O OCH 3 OH A CHO CHO B OH CHO C

1. A = DIBAL-H, B = NaOH (alc) , C = Zn/HCl
2. A = DIBAL-H, B = NaOH (aq) , C = NH 2 -NH 2 /KOH, ethylene glycol
3. A = LiAlH 4 , B = NaOH (alc) , C = Zn/HCl
4. A = LiAlH 4 , B = NaOH (aq) , C = NH 2 -NH 2 /KOH, ethylene glycol

Correct answer: A = DIBAL-H, B = NaOH (aq) , C = NH 2 -NH 2 /KOH, ethylene glycol

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