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: Social & Preventive Medicine
[{'content': 'Iodised salt was first started in which country ? \nSelect and explain. \nA. India, B. UK, C. Switzerland, D. Germany', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]