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: Biochemistry
[{'content': 'The best source of potassium is \nSelect and explain. \nA. Whole grains, B. Red meat, C. Dried fruits, D. Milk', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]