Choose the correct answer:
 
Calcium oxide reacts vigorously with water to produce slaked lime.

\(CaO(s) + H_2O(l) → Ca(OH)_2(aq)\)

This reaction can be classified as _______.

i. exothermic reaction
ii. combination reaction
iii. endothermic reaction
iv. oxidation reaction

Which of the following is a correct answer?