Question

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 for relieving
• B. Which may limit such analgesics' potential to relieve
• C. An effect that may limit their potential to relieve
• D. An effect that may limit the potential of such analgesics for relieving

Answer 1

The correct option is D

An effect that may limit the potential of such analgesics for relieving

Option: (D)

In option A, which is modifying patients in place of psychological disturbances.
In option B, which is modifying patients in place of psychological disturbances.
We have to choose between Option C and D.
In option D, "thier" is ambiguous and could refer back to patients or anlalgesics thus making it an incorrect option.