Let P, Q, R and S be the points on the plane with position vector \( - 2 \hat{i} - \hat{j} , 4 \hat{i} , 3 \hat{i} + 3 \hat{j} \quad\text{and}\quad - 3 \hat{i} + 2 \hat{j} \) respectively. The quadrilateral PQRS must be a-

A Parallelogram, which is neither a rhombus nor a rectangle

B Square

C Rectangle, but not a square