This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infection, Subject name: Medicine
[{'content': 'Pathognomic clinical feature of measles are - \nSelect and explain. \nA. Erythematous macular rash, B. Kolpik spots, C. Brushfield spots, D. Bitots spots', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Kolpik spots * Koplik's spots are pathognomonic of measles and consist of bluish white dots ~1 mm in diameter surrounded by erythema. The lesions appear first on the buccal mucosa opposite the lower molars but rapidly increase in number to involve the entire buccal mucosa. They fade with the onset of rash.", 'role': 'assistant'}]