Let P ,Q ,R and S be the points on the p...

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

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