The strongest acid among the following is:

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(A) The acidity of substituted phenols depends on the electronic effects of the substituents. Electron-withdrawing groups $(EWG)$ increase acidity by

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$3-$Nitrophenol

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(A) The acidity of substituted phenols depends on the electronic effects of the substituents. Electron-withdrawing groups $(EWG)$ increase acidity by stabilizing the phenoxide ion,while electron-donating groups $(EDG)$ decrease acidity.$1$. $-NO_2$ is a strong electron-withdrawing group ($-I$ and $-M$ effect).$2$. $-Cl$ is an electron-withdrawing group ($-I$ effect).$3$. $-CH_3$ is an electron-donating group ($+I$ and hyperconjugation).Comparing the substituents,the $-NO_2$ group has the strongest electron-withdrawing effect,making $3-$nitrophenol the most acidic among the given options.

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