This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'Therapeutic index is a measure of which of the parameters? \nSelect and explain. \nA. Efficacy, B. Adverse effects, C. Safety, D. Potency', 'role': 'user'}, {'content': "Answer: C \nExplanation: Therapeutic index is a measure of the margin of safety of a drug. Therapeutic index = Median lethal dose/Median effective dose. One estimate of a drug's margin of safety is the ratio LD50/ED50, the therapeutic index, which is a statement of how selective the drug is in producing it's desired versus its adverse effects.", 'role': 'assistant'}]