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: Medicine
[{'content': 'Best natural source of iodine is \nSelect and explain. \nA. Milk, B. Sea foods, C. Salt, D. Green leafy Vegetables', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Best natural source of iodine is - Sea foods.', 'role': 'assistant'}]