નીચેની પ્રક્રિયાઓમાં $B$ અને $X$ અનુક્રમે શું છે?
$C_2H_5MgBr$ $\xrightarrow{ClCN} C_2H_5CN$ $\xrightarrow{H_3O^+} B$
$CH_3COCH_3$ $\xrightarrow[NaOH]{I_2} X + CHI_3$ $\xrightarrow{Ag} Y$
$C_6H_5NH_2$ $\xrightarrow[HCl]{NaNO_2} P$ $\xrightarrow{CuCN} Q$ $\xrightarrow{+4H} R$

• A
  $C_2H_5COOH, CH_3COONa$
• B
  $C_2H_5COOH, CH_3I$
• C
  $C_2H_5CH_2NH_2, CH_3I$
• D
  $C_2H_5COOH, CH_3COONa$