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
Infected gangrene of skin and subcutaneous tissues are? 
Select and explain. 
A. Dry gangrene, B. Wet gangrene, C. Erysipelas, D. None of the above
B: Wet gangrene
Answer: B: Wet gangrene 
Explanation: Dry gangrene as a result of ischemia due to arterial occlusion (arteriosclerosis) by, that leads to coagulative necrosis.
Wet gangrene When the overlying skin of dry gangrenous tissue is devitalized, bacterial infection is superimposed. More commonly due to venous occlusion then arterial occlusion.
Erysipelas is an acute infection of the upper dermis and superficial lymphatics, usually caused by beta-hemolytic group A Streptococcus bacteria.