If a, b, c are integers and ab>0, bc >0, ac<0, then which of the following is false?
I.	a=0, b>0, c>0
II.	a>0, b=0, c>0
III.	a>0, b>0, c=0 Choices:
A) I only B) II only C) III only D) I, II and III E) None of the above
We could solve this easily.   I is false. If a=0 then ab=0, ac=0. But since ac&lt;0, it is false.   II is false. If b=0 then ab=0, bc=0. But since bc&gt;0, it is false.   III is false. If c=0 then ac=0, bc=0. But since ac&lt;0, it is false.   So, the answer is I, II and III
<result>D</result>
If a, b, c are integers and ab>0, bc >0, ac<0, then which of the following is false?
I.	a=0, b>0, c>0
II.	a>0, b=0, c>0
III.	a>0, b>0, c=0