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': 'A women at 8 months of pregnancy complains of abdominal pain and slight vaginal bleed. On examination the uterine size is above the expected date with absent fetal heart sounds. The diagnosis: \nSelect and explain. \nA. Hydramnios, B. Concealed hemorrhage, C. Active labour, D. Uterine rupture', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Let’s analyse all options separately to see which suits the best.', 'role': 'assistant'}]