The order of strength of carboxylic acid is Find the correct order.

Step-by-step solution

The acidic strength of a carboxylic acid depends on the stability of its conjugate base (carboxylate anion). Electron-withdrawing groups ( -I effect) stabilize the anion and increase acidic strength. In the given compounds, the oxygen atom in the ring is more electronegative than carbon and exerts a -I effect. In structure (I), the oxygen atom is at the 4-position relative to the carbon bearing the - COOH group. In structure (II), there is no electronegative heteroatom in the ring, making it the least acidic among