This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: New Born Infants, Subject name: Pediatrics
[{'content': 'Which one of the following does NOT present with a large anterior fontanelle? \nSelect and explain. \nA. Crouzon syndrome, B. Hypophosphatasia, C. Achondroplasia, D. Congenital rubella syndrome', 'role': 'user'}, {'content': "Answer: A \nExplanation: a. Crouzon syndrome(Ref: Nelson's 20/e p 2817)Crouzon syndrome is a cause of craniosynostosis (premature fusion of sutures), so the fontanelle are small & close early.", 'role': 'assistant'}]