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': 'In which of the following conditions gingivectomy is contraindicated: \nSelect and explain. \nA. Gingival sulcus beyond mucogingival junction, B. Enlargement of the gingiva, C. Papillary enlargement., D. Enlargement due to acute systemic disease', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]