Three beakers labelled as A, B and C each containing 25 mL of water were taken.

Three beakers labelled as A, B and C each containing 25 mL of water were taken. A small amount of NaOH, anhydrous CuS04 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 fell. 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.

(a) (i) only

(b) (ii) only

(c) (i) and (iv)

(d) (ii) and (iii)