Among the given elements, least IP2  value is for

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 ;IP2 decreases from Be to Ba ;