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': 'Removal of 7/7 in preference is indicated to \nSelect and explain. \nA. Mild class II div. 1 cases, B. In adult patients, C. When 8/8 are congenitally absent, D. When 6/6 are inclined distally', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]