This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urinary tract, Subject name: Pathology
[{'content': 'The incidence of bilaterally in a dermoid cyst is approximately \nSelect and explain. \nA. 10 percnt, B. 30 percnt, C. 50 percnt, D. 70 percnt', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Refer Robbins page no 1029 Germ cell tumor constitutes 15-20 percnt of all ovarian tumors Most are benign cystic teratoma, also known dermoid cyst', 'role': 'assistant'}]