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
Ruston bodies are resent in 
Select and explain. 
A. Apical periodontal cyst, B. Infected dentigerous cyst, C. Gingival cyst of neonate, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Ruston bodies are present in 

Apical periodontal cyst
Infected dentigerous cyst
Gingival cysts of neonate