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
Not a muscle of the tongue 
Select and explain. 
A. Genioglossus, B. Sternohyoid, C. Hyoglossus, D. Styloglossus
B: Sternohyoid
Answer: B: Sternohyoid 
Explanation: Intrinsic muscles of the tongue: 

Muscles found entirely within the tongue
Longitudinal, transverse, and vertical muscles
Function - change the shape of the tongue.

Extrinsic muscles of the tongue:

Genioglossus, Styloglossus, and hyoglossus, Palatoglosus.
All insert into the tongue, originate from surrounding structures