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': 'What is Ranula - \nSelect and explain. \nA. Retention cyst of sublingual gland, B. Retention cyst of submandibular gland, C. Extravasation cyst of sublingual glands, D. Extravasation cyst of submandibular glands', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Retention cyst of sublingual gland", 'role': 'assistant'}]