This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Physiology
vital capacity of 45 yr old male patient is 4000ml , with IRV = 500ml , ERV = 500ml with respiratory rate of 22/min, calculate minute ventilation of the patient ? 
Select and explain. 
A. 66, B. 120, C. 33, D. 100
A: 66
Answer: A: 66 
Explanation: minute ventilation = tial volume x respiratory rate ref : guyton andhall