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': 'Feather edge finish line is indicated in cases of: \nSelect and explain. \nA. Tilted abutment, B. Esthetic areas, C. Upper canine PVC, D. Not recommended', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]