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': 'The angle formed by the occlusal rest and the vertical minor connector from which it originates should be: \nSelect and explain. \nA. 180 degree, B. 45 degree, C. >90 degree, D. <90 degree', 'role': 'user'}, {'content': 'Answer: D \nExplanation: An angle greater than 90 degrees fails to transmit occlusal forces, along the supporting vertical axis of the abutment tooth. This also permits slippage of the prosthesis away from the abutment, which can result in orthodontic-like forces being applied to an inclined plane on the abutment, with possible tooth movement. So the angle formed by the occlusal rest and the vertical minor connector from which it\xa0 originates should be less than 90 degrees.', 'role': 'assistant'}]