$Ph-C{{O}_{2}}H\xrightarrow{SOC{{l}_{2}}}A\xrightarrow{M{{e}_{2}}NH}B\xrightarrow{(C)}Ph-CHO,$ unknown reagent $(C)$ is
  • A$LiAlH_4$
  • B$NaBH_4$
  • C$LiAlH_4 (t - BuO)_3$
  • D$PCC/CH_2Cl_2$
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