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': 'The inner wall of the tubule is highly calcified and termed as \nSelect and explain. \nA. Peritubular dentin, B. Intratubular dentin, C. Both, D. Mantle dentin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Dentin is made up of dentinal tubules. The dentinal tubules contain the protoplasmic process of the odontoblasts called odontoblastic process. The inner wall of the tubule is highly calcified and is termed as peritubular or intratubular dentin. Between the tubules is the intertubular dentin and it is calcified to a lesser degree than peritubular dentin.', 'role': 'assistant'}]