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
All of the following describe pyogenic abscess except 
Select and explain. 
A. Clear edge, B. Non - fluctuant, C. Formed pus, D. Well Localised
B: Non - fluctuant
Answer: B: Non - fluctuant 
Explanation: Pyogenic abscess is fluctuant.