This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Viral Infections, Subject name: Pediatrics
[{'content': "Koplik's Spots are seen in - \nSelect and explain. \nA. Rubeola, B. Rubella, C. Diphtheria, D. Polio", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Rubeola Clinical features of measles (rubeola)o Clinical features are divided into following stages :-1) Prodromal stage# It begins 10 days after the infection and is characterized by fever, coryza with sneezing, lacrimation and photophobia. A day or two before eruptive phase (appearance of rash), Koplik spot (pathognomonic of measles) appears on buccal mucosa, opposite the 1st and 2nd lower molars.2) Eruptive phase# It begins 14 days after infection. A maculopapular rash begins behind the ears and spreads rapidly.3) Post measle stage# It is characterized by weight loss, growth retardation, diarrhea, cancrum oris, candidiasis, reactivation of TB and malnutrition particularly vitamin A deficiency (keratomalacia, xerophthalmia).", 'role': 'assistant'}]