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Question
IUPAC name of the following compound is CH3CH=CHCH?
Options:
A .  5-Pentyn-3-ene
B .  3-Penten-1-yne
C .  1-Pentyn-3-ene
D .  None of these
Answer: Option B
:
B
1CH352CH4=3CH34C25CH1
From lowest sum rule, we will select 1,3 and not 2,4
Five carbons word root = pent
3-Penten-1-yne

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