Compare acidic strength of following ?A I > II > III > IV B IV > III > I > II C III > IV > II > I D IV > I > III > II

To compare the acidic strength of the given compounds, we need to analyze the factors that affect acidity. The main factors are the stability of the conjugate base and the strength of the acid.

In option A, it is stated that compound I is more acidic than compound II, which is more acidic than compound III, and compound III is more acidic than compound IV. This suggests that the acidity increases from compound IV to compound I.

In option B, it is stated that compound IV is more acidic than compound III, which is more acidic than compound I, and compound I is more acidic than compound II. This suggests that the acidity increases from compound II to compound IV.

In option C, it is stated that compound III is more acidic than compound IV, which is more acidic than compound II, and compound II is more acidic than compound I. This suggests that the acidity increases from compound I to compound III.

In option D, it is stated that compound IV is more acidic than compound I, which is more acidic than compound III, and compound III is more acidic than compound II. This suggests that the acidity increases from compound II to compound IV.

Based on the given options, it is clear that the order of acidic strength is different in each option. Therefore, it is not possible to determine the exact order of acidic strength without additional information or experimental data.