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: Gynaecology & Obstetrics
Which of the following ovarian tumor is most prone to undergo torsion during pregnancy: 
Select and explain. 
A. Serous cystadenoma, B. Mucinous cystadenoma, C. Dermoid cyst, D. Theca lutein cyst
C: Dermoid cyst
Answer: C: Dermoid cyst 
Explanation: None