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': 'Symptoms of ovarian hyperstimulation syndrome are all except \nSelect and explain. \nA. Ascites, B. Polyuria, C. Hemoconcentration, D. Thromboembolism', 'role': 'user'}, {'content': 'Answer: B \nExplanation: OHSS is characterized by Oliguria (not polyuria).', 'role': 'assistant'}]