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: Pediatrics
[{'content': "Child's respiratory physiology differs from adult because of - \nSelect and explain. \nA. Smaller airways, B. Increased O2 demand, C. Decreased tidal volume, D. Decreased residual volume", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Smaller airways Younger infants are more vulnerable because : - i) Smaller airways ii) More compliant chest wall iii) Poor hypoxic drive", 'role': 'assistant'}]