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: Pathology
[{'content': 'Which is true of Benign Ovarian tumour - \nSelect and explain. \nA. Torsion is uncommon, B. Capsule is Intact, C. Ascites can occur, D. Size less than 10 cm', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Capsule remains intact in benign ovarian tumor.\nTorsion is a common complication.\nAscites is a complication of malignant tumor.', 'role': 'assistant'}]