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
An epithelial lining is typically found in all of the following except: 
Select and explain. 
A. Sinuses, B. Fistulae, C. Aneurismal bone cysts, D. Keratocytes
C: Aneurismal bone cysts
Answer: C: Aneurismal bone cysts 
Explanation: None