This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
[{'content': 'Most common cause of common cold is \nSelect and explain. \nA. Corona virus, B. Echo virus, C. Rhino virus, D. Arbo  virus', 'role': 'user'}, {'content': 'Answer: C \nExplanation: M/c cause of common cold is Rhino virus.', 'role': 'assistant'}]