Answer is C

From clue 1, 2(x - y) = 1==> x - y = 1/2.

For (x,y) being (1,1/2) satisfying clue 1, x and y are positive.

For (x,y) = (-1/2,-1) satisfying clue 1, x and y are negative.

Two different ans and hence Insufficient.

From clue 2,

x/y > 1 ==> x > y. ==> x-y > 0. (if y is positive)

For (x,y) being (3,1) satisfying clue 1, x and y are positive.

x/y > 1 ==> x x-y 0. Does not provide any addiitonal information. Hence insufficient.

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