Which set of elements have strongest tendency to form anions ?

Which of the following sets of elements have the strongest tendency to form anions?

Which of the following set of elements has the strongest tendency to form anions?

Which of the following sets of elements has the strongest tendency to form positive ions in gascous state?

Which of the following sets has the strongest tendency to form anions ? V, Cr, Mn Ga, In, Tl Na, Mg, Al N, O, F.

Elements of which of the following sets has the strongest tendency to form anions?

Which of the following set of elements has the least tendency to form ionic compounds. (A) "Al,Na," B) Be,Li (C) "Ba,K (D) Cs,Ca