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': 'Which of the following swelling moves on protrusion of tongue - \nSelect and explain. \nA. Thyroglossal cyst, B. Branchial cyst, C. Ranula, D. Cyst in hyoid bone', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]