P,Q and R are three points with position vector i + j , i - j and ai +bj +ck respectively. if P,Q,R are collinear then

If A,B,C are three points with position vectors veci+vecj,veci-hatj and pveci+qvecj+rveck respectiey then the points are collinear if (A) p=q=r=0 (B) p=qr=1 (C) p=q,r=0 (D) p=1,q=2,r=0

Let P,Q,R and S be the points on the plane with position vectors -2i-j,4i,3i+3j and -3j+2j respectively.The quadrilateral PQRS must be a Parallelogram,which is neither a rhombus nor a rectangle Square Rectangle,but not a square Rhombus,but not a square

If P, Q, R are three points with respective position vectors hati + hatj, hati -hatj and a hati + b hatj + c hatk . The points P, Q, R are collinear, if