This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NEET Jan 2020, Subject name: Pharmacology
[{'content': 'Which of the following drugs shown in the graph below has highes potency? \nSelect and explain. \nA. Drug A, B. Drug B, C. Drug C, D. Both Drug A and', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Drug potency and efficacy', 'role': 'assistant'}]