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
[{'content': '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 ? \nSelect and explain. \nA. 66, B. 120, C. 33, D. 100', 'role': 'user'}, {'content': 'Answer: A \nExplanation: minute ventilation = tial volume x respiratory rate ref : guyton andhall', 'role': 'assistant'}]