In the figure shown below, \[OS\bot ~OP,\text{ }OQ~\bot ~OT\]and OR is bisector of\[\angle SOQ\]. If \[\angle POT=48{}^\circ ,\]then find the measure of\[\angle ROS\].

• A.  \[24{}^\circ \]             
• B.         \[48{}^\circ \]
• C.  \[42{}^\circ \]             
• D.         \[34{}^\circ \]
• E.  None of these