d
\((a)\,\mathop {Se}\limits_{4{p^4}} \xrightarrow{{I.E{._1}}}\mathop {S{e^ + }}\limits_{4{p^3}} \xrightarrow{{I.E{._2}}}\mathop {S{e^{2 + }}}\limits_{4{p^2}} \)   \(\mathop {As}\limits_{4{p^3}} \xrightarrow{{I.E{._1}}}\mathop {A{s^ + }}\limits_{4{p^2}} \xrightarrow{{I.E{._2}}}\mathop {A{s^{2 + }}}\limits_{4{p^1}} \)

\((b)\,\mathop C\limits_{2{p^2}}  \to \mathop {{C^ + }}\limits_{2{p^1}}  \to C_{2{s^2}}^{2 + }\)   \(\mathop N\limits_{2{p^3}}  \to \mathop {{N^ + }}\limits_{2{p^2}}  \to \mathop {{N^{2 + }}}\limits_{2{p^1}} \)   \(\mathop O\limits_{2{p^4}}  \to \mathop {{O^ + }}\limits_{2{p^3}}  \to \mathop {{O^{2 + }}}\limits_{2{p^2}} \)

\((c)\,\mathop F\limits_{2{p^5}} \xrightarrow{{I.E{._1}}}\mathop {{F^ + }}\limits_{2{p^4}} \xrightarrow{{I.E{._2}}}\mathop {{F^{2 + }}}\limits_{2{p^3}} \xrightarrow{{I.E{._3}}}{F^{3 + }}\)   \(\mathop O\limits_{2{p^4}} \xrightarrow{{I.E{._1}}}\mathop {{O^ + }}\limits_{2{p^3}} \xrightarrow{{I.E{._2}}}\mathop {{O^{2 + }}}\limits_{2{p^2}} \xrightarrow{{I.E{._3}}}{O^{3 + }}\)

\((d)\) In respective period, noble gases have highest \(I.E.\)