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': 'Supine hypotension syndrome occurs in : \nSelect and explain. \nA. Obesity, B. Ascites, C. Early pregnancy, D. Advanced pregnancy', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Advanced pregnancy', 'role': 'assistant'}]