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': 'Mental spines provide attachment to \nSelect and explain. \nA. Genioglossus, B. Anterior & posterior bellies of digastric, C. Mylohyoid, D. Superior constrictor of pharynx', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Mental spine\xa0also known as genial tubercle, is a small bony elevation found on the inner surface of mandible,\xa0in the midline.\nThere are 4 mental spines\xa0- superior and inferior pair.\n\n\nSuperior genial tubercle gives origin to genioglossus muscle of tongue.\nInferior genial tubercle gives origin to geniohyoid muscle.', 'role': 'assistant'}]