This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Gynaecology & Obstetrics
[{'content': 'Which of the following ovarian tumor is most prone to undergo torsion during pregnancy : \nSelect and explain. \nA. Serous cystadenoma, B. Mucinous cystadenoma, C. Dermoid cyst, D. Theca lutein cyst', 'role': 'user'}, {'content': 'Answer: C \nExplanation: "A benign cystic teratoma is the most common neoplasm to undergo torsion, and it to the M/C benign tumor diagnosed during pregnancy." A benign cystic teratoma is synonymous to dermoid cyst. REF : gynecology book of shaw 17th', 'role': 'assistant'}]