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: Pathology
[{'content': 'Best results are obtained in oral submucous fibrosis is by: \nSelect and explain. \nA. Intralesional cortisone therapy, with hyaluronic acid, B. Oral cortisone with intralesional therapy (cortisone), C. Vitamin E and oral cortisone, D. Intralesional placental extract', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]