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': 'Neonatal lines are seen in \nSelect and explain. \nA. Enamel of deciduous incisors, B. Enamel of permanent incisors, C. Enamel of premolars, D. Dentin of all teeth, as if is formed first', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Because of undisturbed and even development of the enamel prior to birth, perikymata are absent in the occlusal. enamel of deciduous teeth, whereas they are present in the postnatal cervical parts.', 'role': 'assistant'}]