The unsaturated ether On acidic hydrolysis produces carbonyl compom1ds as shown below:-

Based On this, predict the solution/reagent that will help to distillguish "P" and "Q" obtained in the following reaction:-

A

2, 4 - DNP reagent

B

Fehling solution

C

Saturated $$NaHSO_{3}$$ solution

D

Lucas reagent