Bunuel wrote:
Is 4m - 5n > m^2 ?
(1) n is negative.
(2) m is an integer between 0 and 4, inclusive.
(1) n is negative. If m = 4, n = -1, then 4(4)-5(-1)=16+5>16, true; If m = -1, n = -1, then 4(-1)-5(-1)=1=1, false; insufficient.
(2) m is an integer between 0 and 4, inclusive. If m = 4, n = -1, then 4(4)-5(-1)=16+5>16, true; If m = 1, n = 5, then 4(1)-5(5)=-21<1, false; insufficient.
(1) & (2). If m = 4, n = -1, then 4(4)-5(-1)=16+5>16, true; If m = 0, n = -1, then 4(0)-5(-1)=5>0, true; sufficient.
(C) is the answer.