Among the given elements, least IP1 value is for
Li
B
Be
C
IP1- Li < B < Be < C < O < N < F < Ne ;
IP2- Be < C < B < N < F < O < Ne < Li ;
IP1- Na < Al < Mg < Si < S < P < Cl < Ar ;
IP2- Mg < Si < Al < P < Cl < S < Ar < Na ;