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': 'A Female patient comes for treatment of discoloured maxillary canine tooth. On examination there is yellowish discoloration of tooth which is not tender on palpation or percussion test. Radiograph reveals obliteration of root canal. History of trauma is elicited on questioning.\nWhat is the treatment to be considered? \nSelect and explain. \nA. Ceramic veneer, B. Ceramic crown only, C. In office vital tooth bleaching, D. RCT followed by crown', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]