This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Physiology
Leydig cells secrete 
Select and explain. 
A. Inhibin, B. MIS, C. Testosterone, D. Androgen binding protein
C: Testosterone
Answer: C: Testosterone 
Explanation: Leydig cells are the cells between the seminiferous tubules of the testis that secrete testosterone.Ref: Ganong&;s review of medical physiology; 24th edition; page no:-394