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: Physiology
Spermatogenesis occurs at: 
Select and explain. 
A. Body temperature, B. Temperature lower than core body temperature, C. Temperature higher than core body temperature, D. Temperature does not play a role
B: Temperature lower than core body temperature
Answer: B: Temperature lower than core body temperature 
Explanation: Spermatogenesis requires a temperature considerably lower than that of the interior of the body. Ref: Ganong's Review of Medical Physiology, 22nd Edition, Page 427; Guyton and Hall - Textbook of Medical Physiology, 10th Edition, Page 920