MCQ
The $IUPAC$ name of (figure) is


- A$3-$ Methylpent $-1-$ en $-4-$ al
- ✓$3-$ Methylpent $-4-$ enal
- C$3-$ Methylpent $-4-$ carbaldehyde
- D$3-$ Methyl $-5-$ oxopent $-1-$ ene

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(Assume: Momentum is conserved when photon is absorbed. Use: Planck constant $=6.6 \times 10^{-34} J s$, Avogadro number $=6 \times 10^{23} mol ^{-1}$, Molar mass of $He =4 g mol ^{-1}$ )