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
Which of the followoing is major site of Expression of GLUT5? 
Select and explain. 
A. Renal tubules, B. Brain, C. Placenta, D. Sperm
D: Sperm
Answer: D: Sperm 
Explanation: GLUT5 functions as Fructose transpoer in sperm. Ref: Ganong's Review of Medical Physiology, 23rd Edition, Page 320.