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
Sialolith in the excretory duct, will result in: 
Select and explain. 
A. chronic sialadenitis, B. mucous retention cyst, C. pleomorphic adenoma, D. rupture of the duct
B: mucous retention cyst
Answer: B: mucous retention cyst 
Explanation: None