This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pharmacology
[{'content': 'Norplant contains how many capsules of levonorgestrel: \nSelect and explain. \nA. 4, B. 6, C. 8, D. 10', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Norplant contains a set of 6 capsules each containing 36mg levonorgestrel for subcutaneous implantation-placed subcutaneously in the medial aspect of upper arm (Ref.Essentials of medical pharmacology TD Tripathi 6th edition page no.323)', 'role': 'assistant'}]