This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hematology, Subject name: Pediatrics
[{'content': 'MCV (fl) in infant of 1 month of age is \nSelect and explain. \nA. 76-80, B. 80-100, C. 90-100, D. 101-125', 'role': 'user'}, {'content': 'Answer: B \nExplanation: MCV at bih will be about 100-110 will reduce to 80-100 by 5 years. MCV. 0-1 month 1-3 months 3-6 months 6 months-1 year. 88-123 91-112 74-108 70-85. femtoliters Reference: GHAI Essential pediatrics, 8th edition', 'role': 'assistant'}]