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': 'The newborn hea rate is about - \nSelect and explain. \nA. 120 - 160 /min, B. 160 - 180 /min, C. 180 - 200 /min, D. 200 - 220 /min', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., 120-160/min", 'role': 'assistant'}]