In the reaction sequence : $CaC_2 \quad \underrightarrow {H_2O} \quad A \quad \underrightarrow {dil.H_2SO_4} \quad B \quad \underrightarrow {H_2/Ni}\quad C$, the term C is

Question

$\begin{array}{1 1} CH_3CHO \\ HCHO \\ C_2H_5OH \\ CH_3OH \end{array}$