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': 'Infected gangrene of skin and subcutaneous tissues are? \nSelect and explain. \nA. Dry gangrene, B. Wet gangrene, C. Erysipelas, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Dry gangrene as a result of ischemia due to arterial occlusion (arteriosclerosis) by, that leads to\xa0coagulative necrosis.\nWet gangrene When the overlying skin of dry gangrenous tissue is devitalized, bacterial infection is\xa0superimposed. More commonly due to venous occlusion then arterial occlusion.\nErysipelas is an acute infection of the upper dermis and superficial lymphatics, usually caused by beta-hemolytic\xa0group A Streptococcus bacteria.', 'role': 'assistant'}]