1. In large doses, analgesics that work in the brain as antagonists to certain chemicals have caused psychological disturbances in patients, which may limit their potential to relieve severe pain.
(A) which may limit their potential to relieve (which is modifying patients in place of psychological disturbances)
(B) which may limit their potential for relieving (which is modifying patients in place of psychological disturbances)
(C) which may limit such analgesics’ potential to relieve (which is modifying patients in place of psychological disturbances).
(D) an effect that may limit their potential to relieve
(E) an effect that may limit the potential of such analgesics for relieving
In this Q I am b/w D and E.
D. "thier" I think is ambiguous and could refer back to patients or anlalgesics and hence I want to rule D out
E. "for relieving" - is this wrong. I know " ...ing" is suggesting an activity that began in the past and is still continuing.