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': 'A young adult shows non-fluctuant, tender and red swellingin the marginal gingival lesion. This is most likely: \nSelect and explain. \nA. Periodontal abscess, B. Periapical abscess, C. Gingival abscess, D. Periapical sinus', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]