Write the number of pairs in which size of first element or ion is higher as compared to second out of following nine pairs.
(O,S),(He,Ne),(Kr,Ne),Na,Na+,Cl,Cl−,I−,Cl−,LiAq+,NaAq+,(Li,Na),Li+,Na+
(Kr,Ne),Na,Na+,I−,Cl−,LiAq+,NaAq.+