In which of the following reactions will cyanide be obtained as a major product?

  • A
    $Ph-C(=O)-CH_3 \xrightarrow[(i) \ LiAlH_4]{(ii) \ H_3O^+} Ph-CH(OH)-CH_3$
  • B
    $Ph-C(=O)-NH_2 \xrightarrow[Br_2]{NaOH} Ph-NH_2$
  • C
    $Ph-C(=O)-NH_2 \xrightarrow{P_4O_{10}} Ph-C \equiv N$
  • D
    $Ph-C(=O)-OH$ $\xrightarrow{SOCl_2} Ph-C(=O)Cl$ $\xrightarrow{NH_3} Ph-C(=O)-NH_2$

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