This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
[{'content': 'Which of the following statement is/are true of all paramyxoviruses - \nSelect and explain. \nA. They contain a single stranded RNA genome of negative polarity, B. Envelope is derived from the host cells plasma membrane, C. They have a cytoplasmic site of replication, D. They enter the body by the respiratory route', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Paramyxoviruses are linear ssRNA REF:<\\p> MICROBIOLOGY ANANTHA NARAYANAN NINTH EDITION PAGE.506', 'role': 'assistant'}]