Given two mixtures: (I) NaOH and `Na_(2)CO_(3)` and (II) `NaHCO_(3)` and `Na_(2)CO_(3)`.
100 ml of mixture I required w and x ml of 1 M HCl is separate titrations using phenophthalein and methyl orange indicators while 100 ml of mixture II required y and z ml of same HCl solutioni in separate titrations using the same indicators.

Answer

A, B, C, D