4. d and f- block elements — Chemistry STD 12 Science — Question

$(1)$ $\begin{matrix}
   C{{H}_{3}}  \\
   |\,\,\,\,\,\,  \\
   ZNH\,C\,HC{{O}_{2}}H  \\
\end{matrix}$                             $(2)$ $\begin{matrix}
   C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   {{H}_{2}}N\,C\,HC{{O}_{2}}C{{H}_{2}}{{C}_{6}}{{H}_{5}}  \\
\end{matrix}$

$(3)$ $\begin{matrix}
   \,\,\,\,\,\,\,\,\,\,\,\,C{{H}_{3}}{{C}_{6}}{{H}_{5}}  \\
   |\,\,\,\,\,  \\
   ZNH\,C\,HC{{O}_{2}}H  \\
\end{matrix}$                $(4)$ $\begin{matrix}
   C{{H}_{2}}{{C}_{6}}{{H}_{5}}\,\,\,\,\,  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   {{H}_{2}}N\,CHC{{O}_{2}}C{{H}_{2}}{{C}_{6}}{{H}_{5}}  \\
\end{matrix}$

$\begin{array}{*{20}{c}}
  {\,\,\,\,\,O} \\ 
  {\,\,\,\,\,||} \\ 
  {HOC{H_2}C{H_2} - C - OC{H_2}C{H_3}} 
\end{array}$ $\xrightarrow{{PCC}}(A)\,\xrightarrow[{(1\,\,molar\,\,equivalent)}]{{{H_2}C \equiv CHMgBr}}(B)$ $\xrightarrow{{N{H_4}Cl\,/\,{H_2}O}}\,(C)\,\,\xrightarrow[{{H_2}O}]{{KOH}}\,$ $\xrightarrow{{{H_3}{O^ \oplus }}}\,\,\xrightarrow[{pyridine}]{{\begin{array}{*{20}{c}}
  {\,\,\,\,\,\,\,O} \\ 
  {\,\,\,\,\,\,||} \\ 
  {{{(C{H_3} - C)}_2}O} 
\end{array}}}(D)$