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: Surgery
Most common testicular tumor in Pre pubertal age 
Select and explain. 
A. Seminomas, B. Sertoli cell tumors, C. Leydig cell tumors, D. Yolk sac tumors
D: Yolk sac tumors
Answer: D: Yolk sac tumors 
Explanation: Yolk sac tumors are most commonly found in pre pubertal age group.