This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuroanatomy, Subject name: Anatomy
[{'content': 'Accessory muscle of mastication: \nSelect and explain. \nA. Risorius, B. Orbicularis oris, C. Buccinator, D. Platysma', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. C BuccinatorRef: Gray's Anatomy 41st ed. P 495* It is a thin quadrilateral muscle of cheek, occupies the interval between maxilla and mandible.* It compresses the cheek against the teeth and gums during mastication and assists the tongue in directing the food between teeth.Classically the muscles of mastication are:* Masseter* Medial Pterygoid* Lateral Pterygoid* TemporalisAccessory muscles of mastication* Anterior belly of digastric* Mylohyoid muscle* Geniohyiod muscle* Buccinator", 'role': 'assistant'}]