Consider the acidity of the carboxylic acids:(1) PhCOOH(2) o−NO2C6H4COOH(3) p−NO2C6H4COOH(4) m−NO2C6H4COOHWhich of the following order is correct?

Electron withdrawing group increases the acidic nature of benzoic acid, o-isomer will have higher acidic nature than -p position have more pronounce electron-withdrawing effect than NO2 group at -m position.Hence the order of acidity is    2 > 3 > 4 > 1