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': 'Not a feature of Riboflavin deficiency \nSelect and explain. \nA. Angular Stomatitis, B. Magenta Coloured tongue, C. Peripheral Neuropathy, D. Sore throat', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]