Let \(\vec{PR}=3\hat{i}+\hat{j}-2\hat{j}\) and \(\vec{SQ}=\hat{i}-3 \hat{j -4\hat{k}}\) determine diagonals of a parallelogram PQRS and \(\vec{PT}=\hat{i}-2 \hat{j -3\hat{k}}\) be another vector. Then the volume of the parallelepiped determined by the vectors \(\vec{PT},\vec{PQ}\) and \(\vec{PS}\) is
(A) 5
(B) 20
(C) 10
(D) 30
