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': 'Which of the following may least be used as an abutment: \nSelect and explain. \nA. Tooth with minimum crown, B. Tooth with short tapered crown and conical roots, C. Rotated and tipped tooth, D. Pulp treated tooth', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]