In which reaction last production is `Ph-C-=CH`?
A. `C_(6)H_(5)-overset(Br)overset(|)underset(Br)underset(|)(C)-CH_(3)overset(3NaNH_(2))underset("Mineral oil, heat")(to)overset(NH_(4)Cl" ")(to)`
B. `C_(6)H_(5)CH=CH_(2)overset(Br_(2))underset(C Cl_(4))(to)overset(3NaNH_(2))underset("Mineral oil, heat")(to)overset(NH_(4)Cl" ")(to)`
C. `C_(6)H_(5)-overset(O)overset(||)(C)-CH_(3)overset(PCl_(5))(to)overset(3NaNH_(2))underset("Mineral oil, heat")(to)overset(NH_(4)Cl" ")(to)`
D. All
