Is x - y + 1 greater than x + y - 1 ? (1) x > 0 (2) y < 0

-----------ORIGINAL QUESTION----------------
Is x-y+1 greater than x+y-1 ?

(1) x > 0
(2) y < 0
---------------------------------------------------

If you feel that the answer is C, you must first show that statement 2 is not sufficient.
To do this, you must provide two pairs of values (for x and y) that satisfy statement 2 AND yield different answers to the target question ("Is x-y+1 greater than x+y-1 ?")

So, you need one pair of x- and y-values such that x-y+1 IS greater than x+y-1,
...and you need one pair of x- and y-values such that x-y+1 IS NOT greater than x+y-1,

When we use your pair of values (x=1 and y=-1), the answer to the target question is YES, x-y+1 is greater than x+y-1.

To show that statement 2 is not sufficient, you must find another pair of values so that the answer to the target question is NO, x-y+1 is NOT greater than x+y-1.
So, see if you can find such numbers (Note: the numbers must be such that y is negative).