This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
[{'content': 'Plasma drug monitoring is done for \nSelect and explain. \nA. Drug with high safety margin, B. Drug with low safety margin, C. Drug with high therapeutic index, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The difference between the usual effective dose and the dose that causes severe or life-threatening side effects is called the margin of safety.Ref: Essentials of Medical Pharmacology KD TRIPATHI 7th edition Page no: 55', 'role': 'assistant'}]