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: Pathology
In primary atypical pneumonia inflammatory cells accumulate in - 
Select and explain. 
A. Alveolar lumen, B. Bronchioles, C. Alveolar wall, D. Pleural space
C: Alveolar wall
Answer: C: Alveolar wall 
Explanation: Inflammatory infiltrates are virtually localized within the walls of the alveoli.