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
Hairpin shaped eosinophilic structure present in radicular cyst is: 
Select and explain. 
A. Rushton bodies, B. Russell bodies, C. Both of the above, D. None of the above
A: Rushton bodies
Answer: A: Rushton bodies 
Explanation: Periapical Cyst 
The cyst lumen may be filled with fluid and cellular debris. On occasion, the lining epithelium may demonstrate linear or arch-shaped calcifications known as Rushton bodies 
Squamous epithelial cyst lining exhibiting numerous irregular and curvilinear Rushton bodies.