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': 'Of the following minerals the highest amount found in human body is: \nSelect and explain. \nA. Sodium, B. Calcium, C. Phosphorous, D. Iron', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]