12. it is given that, for any real number a, (a) a if a >0 =0 if a<0 suppose for two real numbers x and y, (xy) (x)(y). then which of the following is necessari

12. It is given that, for any real number a, (a) a if a >0 =0 if a<0 Suppose for two real numbers x and y, (xy) (x)(y). Then which of the following is necessarily true? (a) x 0 and y >0. (CxSO and ys0} or bx0 and y < 0} or x>0 and y >0 (d)x20} or {y20} or {x20 and y20} x20 and y20} er is viewed and cited is shown