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: Pathology
All are germ cell tumors except ? 
Select and explain. 
A. Seminoma, B. Leydig cell tumor, C. Embryonal carcinoma, D. Endodermal sinus
B: Leydig cell tumor
Answer: B: Leydig cell tumor 
Explanation: Ans. is 'b' i.e., Leydig cell tumor