Three beakers labelles as A, B and C each containing 25 mL of water were taken. A small amount of NaOH, anhydrous `CuSO_4` and NaCl were added to the breakers A, B and C respectively. It was observed that there was an increase in the temperature of the solutions containers in beaker A, and B, where in case of beaker C, the temperature of the solution falls. Which one of the following statements(s) is(are) correct?
(i) In beaker A and B, exothermic process has occured.
(ii)In beaker A and B, endothermic process has occured.
(iii) In beaker C exothermic process as occured.
(iv) In beaker C endothermic process has occured.

Options

A. (i) only
B. (ii) only
C. (i) and (iv)
D. (ii) and (iii)