This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infectious disease, Subject name: Pediatrics
[{'content': 'Measles virus is \nSelect and explain. \nA. Paramyxovirus, B. Ohomyxovirus, C. Poxvirus, D. Picornavirus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Measles (rubeola) is caused by an RNA virus belonging to the Paromyxovirus family. The virus is transmitted by droplet spread from the secretions of the nose and throat usually 4 days before and 5days after the rash. Virus multiplies in the respiratory epithelium. Reference: Essential pediatrics,op ghai,9 th edition, pg no:209', 'role': 'assistant'}]