This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pharmacokinetics, Subject name: Pharmacology
[{'content': 'Therapeutic index signifies? \nSelect and explain. \nA. Potency, B. Toxic dose, C. Safety, D. Efficacy', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (c) SafetyRef KDT 7/e, p 54/55', 'role': 'assistant'}]