This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Medicine
[{'content': 'A patient with clustered white lesions on the buccal mucosa opposite the upper 1st as 2nd molars pathognomonic for measles These are \nSelect and explain. \nA. Leukoplaka, B. Koplik spots, C. Kaposi spots, D. none', 'role': 'user'}, {'content': 'Answer: B \nExplanation: ref : harrisons 21st ed', 'role': 'assistant'}]