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': "The following are true about measles \nSelect and explain. \nA. It is an RNA virus, B. Causes Koplik's spots on the conjunctiva, C. Acute catarrhal conjunctivitis is a known features, D. All the above", 'role': 'user'}, {'content': "Answer: D \nExplanation: Measles is caused by Morbilivirus which comes under paramyxoviridae family(enveloped ,helical,RNA virus).First signs of clinical disease include prodromal malise,fever,conjunctival injection ,cough & nasal discharge .A day or two before the rash begins,Koplik's spots develop on the buccal mucosa & occasionally on the conjunctiva & intestinal mucosa. Reference : Harrison20th edition pg 879", 'role': 'assistant'}]