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': 'Inferior longitudinal muscle: \nSelect and explain. \nA. Shortens the tongue mad makes the dorsum concave., B. Shortens the tongue and makes the dorsum convex., C. Narrow and elongates the tongue., D. None.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]