When salt solution 'A' is treated with dilute HCI it gives off gas 'B', which when passed through a filter paper, moistened with potassium iodate and starch solution, gives deep blue colouration. 'A' and 'B' respectively are:

When salt solution 'A' is treated with dilute HCI it gives off gas 'B'

1.	When salt solution 'A' is treated with dilute HCI it gives off gas 'B', which when passed through a filter paper, moistened with potassium iodate and starch solution, gives deep blue colouration. 'A' and 'B' respectively are:
Answer» `A = Na_(2)SO_(3)` and `B = SO_(2)` `A = Na_(2)SO_(3)` and `B = CO_(2)` `A = Na_(2)S` and `B = H_(2)S` `A = NaHSO_(3)` and `B =SO_(2)` ANSWER :A::C::D