In a pair of isomers of molecular formula $$\text{C}_5\text{H}_8$$ both the compounds undergo catalytic hydrogenation to form compounds of molecular formula $$\text{C}_5\text{H}_{10}$$. On ozonolysis followed by oxidative workup $$(\text{H}_2\text{O}_2)$$, one of the isomers gives a diacid $$(\text{C}_5\text{H}_8\text{O}_4)$$ while the other isomer gives a ketoacid $$(\text{C}_5\text{H}_8\text{O}_3)$$. The pair/s which give/s above set of reactions is/are