This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: obstetrics,pediatrics and geriatrics, Subject name: Social & Preventive Medicine
[{'content': 'Infant moality rate does not include \nSelect and explain. \nA. Post neonatal moality, B. Early neonatal moality, C. Late neonatal moality, D. Perinatal moality', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ref:Park's Textbook of Preventive and Social Medicine 25th Ed", 'role': 'assistant'}]