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
Most common ovarian tumor to undergo torsion: 
Select and explain. 
A. Benign cystic teratoma, B. Dysgerminoma, C. Serous adenoma, D. Brenners tumor
A: Benign cystic teratoma
Answer: A: Benign cystic teratoma 
Explanation: 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.