Which metal can produce dihydrogen gas by reaction with dil `H_(2)SO_(4)` ?

Which of the following react with dil H_(2)SO_(4) ?

Which of the following can produce I_(2) when reacted with KI and dil. H_(2)SO_(4) ?

Which of the following anions are producing same gas on treatment with (Zn+ " dil." H_(2)SO_(4)) . I :SO_(3)^(2-) " " II : HSO_(3)^(-) " " III : S^(2-) " " IV : Cl^(-)