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 cuspal inclines of the maxillary buccal cusps and the mandibular lingual cusps should be grounded if they are in deflective occlusal contact in: \nSelect and explain. \nA. Working position only, B. Balancing position only, C. Both working and balancing positions, D. Central position', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]