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
Other name of Bay cyst is: 
Select and explain. 
A. Periapical cyst, B. Lateral periodontal cyst, C. Radicular cyst, D. Dentigerous cyst
C: Radicular cyst
Answer: C: Radicular cyst 
Explanation: Apical Periodontal Cyst (Radicular Cyst, Periapical Cyst, Root End Cyst)
There are two distinct variants of apical periodontal cysts, namely, those containing cavities completely enclosed in epithelial lining (True cysts), and those containing epithelium-lined cavities that are open to the affected root canals (bay cysts or pocket cysts).
Reference: Shafer’s Textbook of ORAL PATHOLOGY Eighth Edition page no 76,77