\( \mathrm{A} \stackrel{2 \mathrm{NaNH}_{2}}{\longrightarrow} \mathrm{Ph}-\mathrm{C} \equiv \mat...

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\( \mathrm{A} \stackrel{2 \mathrm{NaNH}_{2}}{\longrightarrow} \mathrm{Ph}-\mathrm{C} \equiv \mathrm{C}-\mathrm{Ph} ; \mathrm{A} \) is:
(A) \( \mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}-\mathrm{Ph} \)
(B)
\( \mathrm{P} \)
W
(C) \( \mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}_{3} \)
(D) None of these
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