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': 'Adjuvaqt used in DPT vaccine is? \nSelect and explain. \nA. Zinc, B. Aluminium, C. Copper, D. Magnesium', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]