This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pathology (Carcinoma Ovary), Subject name: Gynaecology & Obstetrics
Most common ovarian tumor in less than 20 year age group is - 
Select and explain. 
A. Epithelial tumor, B. Germ cell tumor, C. Metastatic tumor, D. Sexcord stromal tumor
B: Germ cell tumor
Answer: B: Germ cell tumor 
Explanation: Ans. is 'b' i.e. Germ cell tumour