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
All of these secrete hormone, except: 
Select and explain. 
A. Granulosa cell tumor, B. Dysgerminoma, C. Hilus cell tumor, D. Theca cell tumor
B: Dysgerminoma
Answer: B: Dysgerminoma 
Explanation: None