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
Dermoid cyst of ovary contains derivatives from: 
Select and explain. 
A. Endoderm, B. Mesoderm, C. Ectoderm, D. All
D: All
Answer: D: All 
Explanation: All