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': 'According to FDI tooth numbering system the number 45 refers to \nSelect and explain. \nA. deciduous mandibular right second molar, B. mandibular right second premolar, C. maxillary right second premolar, D. deciduous maxillary right second molar', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]