Observe the following experiment: Which of the following reaction is/are correctly matched about set-I and set-II?

Observe the following experiment: Which of the following reaction i

1.	Observe the following experiment: Which of the following reaction is/are correctly matched about set-I and set-II?
Answer» `Na_(2)S_(2)O_(3)+2HCI rarr S (darr) +H_(2)SO_(3)+2NaCI` `Na_(2)S_(2)O_(3)+2HCI overset(DELTA)rarr S(darr) +SO_(2)(UARR) +2NaCI +H_(2)O` `3SO_(2)+Cr_(2)O_(7)^(2-)+2H^(+) rarr 2Cr^(3+)+3SO_(4)^(2-)+H_(2)O` `S + H_(2)SO_(3) overset(Delta)rarr H_(2)S_(2)O_(3)` Answer :A::B::C::D