Given: a and b are real numbers. I. Given: a > b we can have 4>3=42>32 and also –3>–4=(–3)2<(–4)2 ∴ I alone in not sufficient II. Given: a > 0 It says nothing above ‘b’ ∴ II alone is not sufficient I & II Even two together are not sufficient. e.g. 4>2=42>22 4>–5=42<(–5)2