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': 'Malignant pustules are seen in: \nSelect and explain. \nA. Tularemia, B. Actinomycosis, C. Anthrax, D. Pemphigus', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Malignant ulcers are seen in Anthrax.\nCutaneous anthrax\n\nThis follows entry of the infection through the skin. The face, neck, hands, arms and back are the usual sites.\nThe lesion starts as a papule 1-3 days after infection and becomes vesicular, containing fluid which may be clear or bloodstained (Case).\nThe whole area is congested and edematous, and several satellite lesions filled with serum or yellow fluid are arranged around a central necrotic lesion which is covered by a black eschar. (The name anthrax, which means coal, comes from the black colour of the eschar.)\nThe lesion is called a malignant pustule.\nThe disease used to be common in dock workers carrying loads of hides and skins on their bare backs and, hence, was known as the hide porter’s disease.\nCutaneous anthrax generally resolves spontaneously, but 10-20 per cent of untreated patients may develop fatal septicemia or meningitis.', 'role': 'assistant'}]