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': 'Among the following Cariostatic substances is/are: \nSelect and explain. \nA. Molybdenum., B. Strontium., C. Lithium., D. All of the above.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Cariostatic substances:\nMolybdenum, Strontium, Vanadium, Lithium, Barium, Boron.', 'role': 'assistant'}]