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
Which is true of Benign Ovarian tumour - 
Select and explain. 
A. Torsion is uncommon, B. Capsule is Intact, C. Ascites can occur, D. Size less than 10 cm
B: Capsule is Intact
Answer: B: Capsule is Intact 
Explanation: Capsule remains intact in benign ovarian tumor.
Torsion is a common complication.
Ascites is a complication of malignant tumor.