Answer:
Option D
Explanation:
CH3CH2CH2OH conc.H2SO4→1600−1800C CH3CH=CH2 Br2→alc.KOH→ CH3CHBr−CH2Br
(Y)
[CH3C(Br)=CH2+CH3CH=CHBr] NaNH2→−HBr CH3C≡CH
(A) (B) (Z)
Alcoholic KOH brings about dehydrobromination of Y and give a mixture of vinyl bromide (A and B) while
NaNH2 being a strong base than alc . KOH readily brings about dehydrobromination of less reactive vinyl bromide to give propyne CH3C≡CH i.e, (Z)