Which has the highest electronegativity?

Which one of the following has the highest electronegativity?

Which of the group-15 hydrides has the highest electronegativity ?

Three elenents A,B and C has electron configuration A=[Ar] 3d610 4s^2,B=[Ar]4s^2 C=[Ar]4s^1 respectively which one has the highest electronegativity?

Elements A, B and C have atomic numbers (Z-2), Z and (Z+1) respectively. Of these, B is an inert gas. (1) Which one of these has the highest electronegativity? (2) Which one of the these has thhe highest ionisation potential?

Elements A, B ,C and atomic number (Z-2), Z and (Z+1) respectively. Of these, B is an inert gas. (a) which one of these has the highest electronegativity? (b) which one of these has the highest value of ionisation potential (c) what is the compound formed by the combination of A and C?