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: Dental
[{'content': 'At birth, which of the following structures is nearest to the size it will eventually attain in adulthood? \nSelect and explain. \nA. Cranium, B. Mandible, C. Middle Face, D. Nasal capsule', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Timing of Cranial Base Growth:', 'role': 'assistant'}]