A solution contains `Na_(2)CO_(3) " and " NaHCO_(3)`. 10 mL of the solution required 2.5 mL of `0.1 M H_(2)SO_(4)` for neutralisation using phenophthalein as indicator. Methyl orange is then added when a further 2.5 mL of `0.2 M H_(2)SO_(4)` was required . Then the amount of `Na_(2)CO_(3) " and " NaHCO_(3)` in 1 litre of the solution is :

Options

A. 5.3 g and 4.2 g
B. 3.3 g and 6.2 g
C. 4.2 g and 5.3 g
D. 6.2 g and 3.3 g

Answer

A