Three beakers labelled as A, B and C each containing 25 ml of water were taken. A small amount of NaOH, anhydrous CuSO4 and NaCl were added to the beakers A, B and C respectively. It was observed that there was an increase in the temperature of the solutions contained in beakers A and B, whereas in case of beaker C, the temperature of the solution falls. Which one of the following statement(s) is (are) correct ?
(i) In beakers A and B, exothermic process has occurred
(ii) In beakers A and B, endothermic process has occurred
(iii) In beaker C exothermic process has occurred
(iv) In beaker C endothermic process has occurred