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 following does NOT changes 
Select and explain. 
A. FEVI, B. Glomerular filtration rate, C. Glucose tolerance test, D. Hematocrit
D: Hematocrit
Answer: D: Hematocrit 
Explanation: D i.e. Hematocrit Hematocrit does not changes with ageQAge related physiological changes