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: Pathology
[{'content': 'Neoplastic transformation in leucopLakia is seen most commonly in \nSelect and explain. \nA. Buccal mucosa, B. Floor of mouth, C. Lateral border of tongue, D. palate', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]