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 $P Q R S$ 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