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: Pharmacology
[{'content': 'The following are the indications for Metronidazole except: \nSelect and explain. \nA. Ulcerative gingivitis, B. Amoebiasis, C. Trichomonas infection, D. Streptococcal sore throat', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]