$(i)$ મિથાઇલએમાઈન $(ii)$ ફોસ્જિન
$(iii)$ ફોસ્ફિન $(iv)$ ડાયમિથાઇલએમાઈન
$\begin{gathered} {C_2}{H_5}MgBr\,\,\xrightarrow{{ClCN}}\,\mathop {{C_2}{H_5}}\limits_{(a)} CN\,\xrightarrow{{{H_3}O{\,^ + }}}\,\,B \hfill \\ C{H_3}COC{H_3}\,\mathop {\xrightarrow[{NaOH}]{}}\limits^{{I_2}} \,X\,\,\mathop + \limits_{} \,\,CH{I_3}\,\mathop {\xrightarrow{{Ag}}}\limits_{} \,\,\,Y\, \hfill \\ \,{C_6}{H_5}N{H_2}\,\,\mathop {\xrightarrow[{HCL}]{}}\limits^{NaN{O_2}} \,\,P\,\,\,\xrightarrow{{CuCN}}\,\,Q\,\,\,\xrightarrow{{ + 4H}}\,\,R \hfill \\ \end{gathered} $
$CH_3CH_2NH_2 + CHCl_3 + 3KOH \rightarrow (a) + (b) + 3H_2O$ $(a)$ અને $(b)$ તરીકેની નીપજો અનુક્રમે કઈ હશે ?