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
Inferior longitudinal muscle: 
Select and explain. 
A. 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.
B: Shortens the tongue and makes the dorsum convex.
Answer: B: Shortens the tongue and makes the dorsum convex. 
Explanation: None