This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pharmacodynamics, Subject name: Pharmacology
[{'content': 'A paial agonist has: \nSelect and explain. \nA. High affinity but low intrinsic activity, B. High affinity but no intrinsic activity, C. Low affinity but high intrinsic activity, D. Low affinity and low intrinsic activity', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Affinity Affinity Intrinsic Activity Agonist High High Paial agonist High Low Inverse agonist High Negative Antagonist High No', 'role': 'assistant'}]