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: Surgery
[{'content': 'Ranula is a: March 2013 (a, d, e) \nSelect and explain. \nA. Retention cyst, B. Extravasation cyst, C. Edema of uvula, D. Edema of floor of mouth', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A i.e. Retention cystBailey & Love (Surgery) states that ranula is an extravasation cyst, but CSDT (Surgey), Dhingra (ENT) & even internet references describe it as retention cyst.', 'role': 'assistant'}]