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: Medicine
Which of the following is not a stage in the progression of community-acquired pneumonia? 
Select and explain. 
A. Red hepatisation, B. Liquefaction necrosis, C. Edema, D. Grey hepatisation
B: Liquefaction necrosis
Answer: B: Liquefaction necrosis 
Explanation: Pathological stages in CAP are edema, red hepatization, grey hepatization and resolution.