This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gynaecological Disorders in Obs., Subject name: Gynaecology & Obstetrics
[{'content': 'Most common ovarian tumor to undergo torsion: \nSelect and explain. \nA. Benign cystic teratoma, B. Dysgerminoma, C. Serous adenoma, D. Brenners tumor', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Benign cystic teratoma * Benign cystic teratoma (dermoid cyst) is the MC benign germ cell tumor and also the MC ovarian tumor to undergo torsion (as it has a lot of fat content, it is more prone to torsion) in nonpregnant patients as well as in pregnancy.", 'role': 'assistant'}]