Given below are two statements 

Statement – I :  Along the period, the chemical reactivity of the element gradually increase from group 1 to group 18

Statement – II : The nature of oxides formed by group 1 elements is basic while that of group 17 elements $(\text{C}l,\text{Br,I})$, is acidic 

In the light of the above statements, choose the most appropriate from the options given below