The direction ratios of a normal to the plane through `(1,0,0)a n d(0,1,0)` , which makes and angle of `pi/4` with the plane `x+y=3,` are a. `<<1,sqrt(2),1 >>` b. `<<1,1,sqrt(2)>>` c. `<<1,1,2>>` d. `<< sqrt(2),1,1>>`