# Let $P,Q,R$ and $S$ be the points on the plane with position vectors $-2 \hat i -\hat j ,4 \hat i, 3 \hat i +3 \hat j$ and $3 \hat i +2 \hat j$ respectively . The quadrilateral $PQRS$ must be a
$\begin{array}{1 1} \text{Parallelogram, which is neither rhombus nor a rectangle } \\ \text{square } \\ \text{rectangle , but not a square } \\ \text{rhombus , but not a square } \end{array}$