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': 'Tinea unguium effects – \nSelect and explain. \nA. Nail fold, B. Nail plate, C. Joints, D. Inter digital space', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Tinea unguium starts either from distal edge of nail plate or from base of nail. It slowly involves the entire nail plate.', 'role': 'assistant'}]