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 is Initial Tooth Preparation stage? \nSelect and explain. \nA. External wall finishing, B. Pulp protection, C. Convenience form, D. Debridement and inspection', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Initial Tooth Preparation Stage\n\nStep 1: Initial depth and outline form.\nStep 2: Primary resistance form.\nStep 3: Primary retention form.\nStep 4: Convenience form.\n\nFinal Tooth Preparation Stage\n\nStep 5: Removal of defective restorative material and/or soft dentin.\nStep 6: Pulp protection.\nStep 7: Secondary resistance and retention forms.\nStep 8: External wall finishing.\nStep 9: Final procedures: debridement and inspection.\n\n\xa0\nReference: Sturdevant operative dentistry 7th edition, Page No:125', 'role': 'assistant'}]