This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
[{'content': 'A paial agonist can antagonize the effects of a full agonist because it has \nSelect and explain. \nA. High affinity but low intrinsic activity, B. Low affinity but high intrinsic activity, C. No affinity and low intrinsic activity, D. High affinity but no intrinsic activity', 'role': 'user'}, {'content': 'Answer: A \nExplanation: High affinity but low intrinsic activity. The activity is mainly governed by affinity , intrinsic activity of a drug. iagonist has high affinity and intrinsic activity,antagonist has affinity but no intrinsic activity zero. Paial agonist has high affinity and low intrinsic activity. KDT 6/e pg 37', 'role': 'assistant'}]