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
[{'content': 'A person is having normal lung compliance and increased airway resistance. The most economical way of breathing for him: \nSelect and explain. \nA. Rapid & deep, B. Rapid & shallow, C. Slow & deep, D. Slow & sallow', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Slow and deep', 'role': 'assistant'}]