Match the entries of column I with appropriate entries of column II and choose the correct option out of the four options given. Column I (Ion) Column II (No. of unpaired electrons) (A) Ti2+ (p) 4 (B) V2+ (q) 5 (C) Mn2+ (r) 2 (D) Fe2+ (s) 3

A-s, B-r, C-q, D-p A-r, B-q, C-s, D-p A-p, B-s, C-q, D-r A-r, B-s, C-q, D-p

A-r, B-s, C-q, D-p

(A) Ti2+: [Ar]3d2 ⇒ 2 unpaired electrons (B) V2+ : [Ar]3d3 ⇒ 3 unpaired electrons (C) Mn2+ : [Ar]3d5 ⇒ 5 unpaired electrons (D) Fe2+ : [Ar]3d6 ⇒ 4 unpaired electrons