Which has bigger electron affinity in each pair? (a)F or Cl^- ,(b)O or O^- , (c)Na^+ or F ,(d)F or F^-

Which has bigger electron affinity in each pair? (a)F or Cl^- ,(b)O o

1.	Which has bigger electron affinity in each pair? (a)F or Cl^- ,(b)O or O^- , (c)Na^+ or F ,(d)F or F^-
Answer» ANSWER :(a)F, (B)`O^-` , (C)`NA^+` , (d)F