This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'Which of the following substances is most potent androgen ? \nSelect and explain. \nA. Dehydroepiandrostenidione, B. Dihydrotestosterone, C. Androstenidione, D. Testosterone', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]