Which is not obtained when metal carbides react with \( \mathrm{H}_...

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Which is not obtained when metal carbides react with \( \mathrm{H}_{2} \mathrm{O} \) ?
(a) \( \mathrm{Al}_{4} \mathrm{C}_{3}+\mathrm{H}_{2} \mathrm{O} \longrightarrow \mathrm{CH} \equiv \mathrm{CH} \)
(b) \( \mathrm{CaC}_{2}+\mathrm{H}_{2} \mathrm{O} \longrightarrow \mathrm{CH} \equiv \mathrm{CH} \)
\( \mathrm{P} \)
(c) \( \mathrm{Mg}_{4} \mathrm{C}_{3}+\mathrm{H}_{2} \mathrm{O} \longrightarrow \mathrm{CH}_{3} \mathrm{C} \equiv \mathrm{CH} \)
(d) \( \mathrm{Be}_{2} \mathrm{C}+\mathrm{H}_{2} \mathrm{O} \longrightarrow \mathrm{CH}_{4} \)
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