Let `O` be the origin. If `A(1,0)a n dB(0,1)a n dP(x , y)` are points such that `x y >0a n dx+y<1,` then (a)`P` lies either inside the triangle `O A B` or in the third quadrant. (b)`P` cannot lie inside the triangle `O A B` (c)`P` lies inside the triangle `O A B` (d)`P` lies in the first quadrant only