What is IUPAC name of crotonyl alcohol?

What is IUPAC name of crotonyl alcohol?
  1. But-3-en-1-ol
  2. But-2-en-1-ol
  3. But-1-en-2-ol
  4. But-1-en-3-ol

Solution

$\mathrm{H}_3 \mathrm{CCH}=\mathrm{CHCH}_2 \mathrm{OH}$ Common name: Crotonyl alcohol IUPAC name: But-2-en-1-ol

Asked in: MHT CET 2023 (13 May Shift 1)

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