On a certain number line, conditions are x<Y<z<U<v. xyzuv>0 Which of the following must be true?
I xy>0
II zu>0
III uv>0
Options:
A) I only
B) II only
C) I and II
D) III only
E) II and III only
Suppose, for the product to be greater than 0, we can two variables as -ve or four variables can be -ve.   We are given : I xy&gt;0 II yz&gt;0 III uv&gt;0   case 1: x and y can be negative/positive and if they are... we get greater than 0.   case 2: we have zu , then z and u both can be negative/positive and if they are... we get greater than 0.   I and II
<result>C</result>
On a certain number line, conditions are x<Y<z<U<v. xyzuv>0 Which of the following must be true?
I xy>0
II zu>0
III uv>0