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: Pathology
[{'content': 'Vitamin "D" deficiency causes all except: \nSelect and explain. \nA. Widening of predentin, B. Defective calcification, C. Microdontia, D. Inter globular dentin formation', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]