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
  $Ph-C(=O)-OH$ $\xrightarrow{SOCl_2} Ph-C(=O)Cl$ $\xrightarrow{NH_3} Ph-C(=O)-NH_2$