This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pharmacology, Subject name: Pharmacology
[{'content': 'TherapeutIc index is a measure of: \nSelect and explain. \nA. Safety, B. Potency, C. Efficacy, D. Selectivity', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The gap between the therapeutic effect DRC (Dose Response Curve)and the adverse effect DRC defines the safety margin or the therapeutic index of a drug. So it is a measure of safety Therapeutic index =median lethal dose /median effective dose or LD 50 /ED 50 Ref; KD Tripathi Pharmacology 7th edition (page no;56 )', 'role': 'assistant'}]