Data Sufficiency (DS) | Is y>0?

Answer is B.

statement 1: x^2-y^2=0; x^2=y^2. there can be infinite numbers where x=y, satisfying statement 1. INSUFFICIENT.

statement 2: x^+y^2=0; x^2=-y^2. as this can never be true except x=y=0 (as square of a number cannot be negative). So we have a definite answer i.e. no. SUFFICIENT.

Thanks
Swapnil Varshney

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