`(i)` A powdered substance `(A)` on treatment with fusion mixture gives a green coloured compound (B). `(ii)` The solution of `(B)` in boiling water on acidification with dilute `H_(2)SO_(4)` gives a pink coloured compound (C ). `(iii)` The aqueous solution of (A) on treatment with NaOH and `Br_(2)-` water gives a compound (D). `(iv)` A solution of (D) in conc. `HNO_(3)` on treatment with lead peroxide at boiling temperature produced a compound `(E)` which was of the same colour at that of `(C )`. `(v)` A solutionof ( A) on treatment with a solution of barium chloride gas a white precipitate of compound (F) which was insoluble in conc. `HNO_(3)` and conc. HCl. Consider the following statements `:` `(I)` An ions of both `(B)` and `(C )` are diamagnetic and have tetradhedral geometry. `(II)` Anions of both (B) and (C ) are paramagnetic and have tetrahedral geometry. `(C )` is diamagnetic but both have same tetrahedral geometry. (IV) Green coloured compound (B) in a neutral or acidic medium disproportionates to give (C ) and (D). Of these select the correct one from the codes given `:`A. I and III onlyB. II and III onlyC. II and IV onlyD. III and IV only