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 about 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: CARBUNCLE
Word meaning of carbuncle is charcoal.

It is an infective gangrene of skin and subcutaneous tissue
StaphyIococcs aureus is the main culprit.
Common site of occurrence is nape of the neck and back. Skin in this area is thick. Condition also can occur in shoulder, cheek. hand. forearm.
It is common in diabetics and after forty years of age.
It is common in males.