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': 'Mesiolingual grooves may be found on which of the following permanent teeth? \nSelect and explain. \nA. Mandibular second molars, B. Mandibular first premolars, C. Maxillary first molars, D. Maxillary canines', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]