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
Which of the following muscle divides the sub-mandibular gland into a superficial and deep part? 
Select and explain. 
A. Genioglossus, B. Mylohyoid, C. Sternohyoid, D. Digastric
B: Mylohyoid
Answer: B: Mylohyoid 
Explanation: None