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': 'Emporiatrics deals with the health of: \nSelect and explain. \nA. Farmers, B. Travellers, C. Industrial workers, D. Mine workers', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Travellers', 'role': 'assistant'}]