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: Gynaecology & Obstetrics
[{'content': 'Streptococcal vaginitis in a child is treated with : \nSelect and explain. \nA. Systemic penicillin, B. Local gentian violet, C. Estrogens, D. Penicillin and estrogens', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Penicillin and estrogens', 'role': 'assistant'}]