This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Physiology
The spirometer can estimate all the following except 
Select and explain. 
A. Total lung capacity, B. Forced expiratory volume in 1 second, C. Peak expiratory flow, D. Vital capacity
A: Total lung capacity
Answer: A: Total lung capacity 
Explanation: The total lung capacity (TLC), about 6,000 mL, is the maximum amount of air that can fill the lungs (TLC = TV + IRV + ERV + RV Ref: guyton and hall textbook of medical physiology 12 edition page number:326,327,328