This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
[{'content': 'Causes of macrocephaly include all of the following except \nSelect and explain. \nA. Rickets, B. Neuro fibromatosis, C. Canavan disease, D. Congenital CMV', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Causes of macrocephaly Increase in skull vault thickness Chronic anemia Rickets Osteogenesis imperfecta Osteopetrosis Storage in brain Tay sachs disease Maple syrup urine disease Leukodystrophy Neurofibromatosis', 'role': 'assistant'}]