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': 'What is the functional form of anterior teeth from the mesial or the distal aspect? \nSelect and explain. \nA. Rhomboidal, B. Trapezoidal, C. Elliptical, D. Wedge-shaped', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]