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: Medicine
[{'content': 'MCV  > 100 fl  in all the following except \nSelect and explain. \nA. Alcohol liver disease, B. Folate deficiency, C. Reticulocytosis, D. Lead poisoning', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Lead poisoning\xa0 - microcytic (MCV < 80 fl).', 'role': 'assistant'}]