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': 'Emporiatrics is the word used to describe the science of: \nSelect and explain. \nA. Epidemics, B. Feet, C. Health of travellers, D. Child health', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]