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': '"Microsomia" is defined as – \nSelect and explain. \nA. Birth weight below 90th percentile, B. Birth weight below 10th percentile, C. Birth weight below 20th percentile, D. Birth weight below 50th percentile', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Microsomia means small for date baby, i.e. newborn baby with a birth weight less than 10th percentile.', 'role': 'assistant'}]