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': 'In a dried skull, holes on the lingual aspects of the deciduous teeth are called \nSelect and explain. \nA. Volkmann canals, B. Canals of Hirschfeld and zuckerland, C. Haversian canals, D. Gubernacular canals', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]