" 67.For "H_(3)PO_(3)" and "H_(3)PO_(4)" the correct choice is "

For H_(2)PO_(3) and H_(3)PO_(4) the correct choice is :

H_(3)PO_(3) is

H_(3)PO_(3) is

For H_3PO_4 and H_3PO_3 the correct choice is:

For H_3 PO_3 and H_3 PO_4 the correct choice is. H_3 PO_3 is dibasic and reducing. H_3 PO_3 is dibasic and non reducing H_3 PO_4 is tribasic and reducing H_3 PO_3 s tribasic acid non-reducing

Statement: H_(3)PO_(3) is dibasic and H_(3)PO_(4) s tribasic acid. H_(3)PO_(3) and H_(3)PO_(4) on reacting with D_(2)O gives HD_(2) PO_(3) and D_(3)PO_(4) respectively.