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': 'All are true about serous cystadenoma of the ovary except: \nSelect and explain. \nA. Bilateral, B. Unilateral, C. Concentric calcification, D. Multiloculated, sticky, gelatinous fluid', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]