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': 'Precision attachments are given in? \nSelect and explain. \nA. Distal extension denture base, B. For extra retention, C. Abutment teeth with large pulp chambers, D. Edentulous area with periodontally stable teeth anteriorly and posteriorly', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]