In which reaction is the final product $Ph-C \equiv CH$?
- A$Ph-C(Br)_2-CH_3$ $\xrightarrow[\text{Mineral oil, heat}]{2NaNH_2}$ $\xrightarrow{NH_4Cl}$
- B$C_6H_5-CH=CH_2$ $\xrightarrow[CCl_4]{Br_2}$ $\xrightarrow[\text{Mineral oil, heat}]{3NaNH_2}$ $\xrightarrow{NH_4Cl}$
- C$C_6H_5-C(=O)-CH_3$ $\xrightarrow{PCl_5}$ $\xrightarrow[\text{Mineral oil, heat}]{3NaNH_2}$ $\xrightarrow{NH_4Cl}$
- DAll of these
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