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: Unknown
[{'content': 'The Centchroman weekly dose is? \nSelect and explain. \nA. 45 mg, B. 60 mg, C. 90 mg, D. 120 mg', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans-BREF: KDT 6th edition page No: 317, Novaks 14 ed.ch 10 table 10.2, William's 22nd ed chapter 32Centchroman has a long plasma 11/2-1 weekDose: 30 mg twice weekly for 12 weeks followed by once weekly as long as fertility is to be suppressed.", 'role': 'assistant'}]