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: Gynaecology & Obstetrics
[{'content': 'Hyperemesis gravidarum is maximum at what gestational age? \nSelect and explain. \nA. 6 weeks, B. 9 weeks, C. 28 weeks, D. 36 weeks', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., 9 weeksMaximum levels of beta HCG occur on 66th day of pregnancy, i.e. 9 weeks 3 days, and thus hyperemesis is maximum at 9 weeks of gestation.", 'role': 'assistant'}]