This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth and development, Subject name: Pediatrics
[{'content': 'Perinatal period corresponds to \nSelect and explain. \nA. 28 weeks of gestation to 7 days after bih, B. Period of labour to newborn period, C. Third trimester of pregnancy to newborn period, D. 36 weeks of gestation to 3 days after bih', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Peaining to the period immediately before and after bih. The perinatal period is defined in diverse ways. Depending on the definition, it stas at the 20th to 28th week of gestation and ends 1 to 4 weeks after bih. Ref : Nelson paediatrics chapter : Growth and develop', 'role': 'assistant'}]