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: Surgery
Which is not true of carbuncle - 
Select and explain. 
A. Infective gangrene of subcutaneous tissue, B. Caused by staphylococcus, C. Diabetics are more prone, D. Caused by streptococcus
D: Caused by streptococcus
Answer: D: Caused by streptococcus 
Explanation: None