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: ENT
True regarding Ranula: 
Select and explain. 
A. It is also called as epulis, B. It is a cystic swelling in the floor of mouth., C. It is a type of thyroglossal cyst, D. It is a type of mucus retention cyst
B: It is a cystic swelling in the floor of mouth.
Answer: B: It is a cystic swelling in the floor of mouth. 
Explanation: Ranula It is a thin walled bluish retention cyst. Seen in the floor of mouth on one side of the frenulum. It arises due to obstruction of duct of sublingual salivary gland. It is almost always unilateral. Clinical Features Seen mostly in children and young adults. Only complain--swelling in the floor of mouth Cyst may rupture spontaneously but recurrence is common