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': 'Drug remaining in body after 3 half lives is \nSelect and explain. \nA. 12.50%, B. 75%, C. 87.50%, D. 94%', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Half-life- time taken by the drug to become half of its earlier concentration it takes 5-6 half-lives for a drug to almost get eliminated from the body Ref: KD Tripathi 8th ed', 'role': 'assistant'}]