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: Dental
[{'content': 'Snake eye appearance is resembled by occlusal view of which tooth \nSelect and explain. \nA. Upper 1st premolar, B. Lower 1stpremolar, C. Upper 2nd premolar, D. Lower 2nd premolar', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]