This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Breast, Subject name: Surgery
[{'content': 'Retromammary abscess arises from: \nSelect and explain. \nA. Tuberculous rib, B. Infected hematoma, C. Chronic empyema, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. (d) All of the above(Ref. Internet Source)* Retromammary abscess is an extension from Breast abscess, Empyema Thoracis, Osteomyelitis of Ribs etc.* No need to drain the Retromammary abscess. Conservative treatment is enough.', 'role': 'assistant'}]