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': 'Muscle responsible for opening of mandibular \nSelect and explain. \nA. Lateral pterygoid, B. Medial pterygoid, C. Temporalis, D. Buccinators', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Masseter and medial pterygoid form a amuscular sling which holds and suspends the mandible. By cambining the actions of both muscles in to a functional unit, this sling enables powerful closure of the jaws.', 'role': 'assistant'}]