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
Lipoma becomes malignant commonly at which site 
Select and explain. 
A. Subcutaneous, B. Retro-peioneal, C. Sub-aponeurotic, D. Intermuscular
B: Retro-peioneal
Answer: B: Retro-peioneal 
Explanation: Ans. is 'b' i.e., Retro- peritoneal