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

A

parallelogram, which is neither a rhombus nor a rectangle

B

square

C

rectangle, but not a square

D

rhombus, but not a square