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: Anatomy
[{'content': 'The action of styloglossus muscle is \nSelect and explain. \nA. Protrusion of tongue, B. Posteriorly retracts the tongue, C. Depression of tongue, D. Elevation of tongue', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]