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': 'In pregnant diabetic intrauterine moality increases after the week of gestation : \nSelect and explain. \nA. 30th, B. 40th, C. 36th, D. 25th', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 40th', 'role': 'assistant'}]