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. Such a cyst is called: 
Select and explain. 
A. Mucocele, B. Ranula, C. Derrnoid cyst, D. Dentigerous cyst
B: Ranula
Answer: B: Ranula 
Explanation: None