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
A cyst occurs under the tongue, caused by obstruction of a salivary gland, called as: 
Select and explain. 
A. Mucocele., B. Ranula., C. Dermoid cyst., D. Dentigerous cyst.
B: Ranula.
Answer: B: Ranula. 
Explanation: None