$a,b,c,=1,2,3$

Which of the following is calculated in the longest amount of time?

$a<mn\; id="EditorElement\_383729">0</mn>$ or $b>0$

II$.c>0$ or $b>0$

III. $a<mn\; id="EditorElement\_383650">0</mn>$ and $c<mn\; id="EditorElement\_383630">0</mn>$

IV$.a==0$ and $b>0$

V$.$ All of them are calculated in the same amount of time