This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Surgery
In a patient of carcinoma tongue, the infiltration of which muscle causes ankyloglossia 
Select and explain. 
A. Styloglossus muscle, B. Genioglossus muscle, C. Mylohyoid muscle, D. Palatoglossus muscle
B: Genioglossus muscle
Answer: B: Genioglossus muscle 
Explanation: Ankyloglossia is due to involvement of muscles of tongue SRB,5th,391.