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': 'Protrusion of tongue is brought out by: \nSelect and explain. \nA. Genioglossus, B. Intrinsic muscles of tongue, C. Styloglossus, D. Palatoglossus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Genioglossus Muscle:\nIt is a fan-shaped extrinsic muscle of tongue and along with its counterpart of the opposite side forms the most of the bulk of the tongue\xa0\nOrigin:\nFrom superior genial tubercle of the mandible.\nInsertion:\nThe fibres radiate backwards fan-wise into the substance of the corresponding half of the tongue alongside the median septum, from the tip to the base, for insertion.\n\nLower fibres are inserted into the body of the hyoid and form the root of the tongue.\nIntermediate fibres pass beneath the anterior border of the hyoglossus and extend backwards up to stylohyoid ligament and middle constrictor of the pharynx.\nUpper fibres turn upwards and forwards to extend up to the tip of the tongue.\n\nNerve supply\nIt is supplied by hypoglossal nerve.\nActions\nThe muscles of both sides together protrude the tongue and make an elongated gutter on the dorsal surface of the tongue for the passage of food.\nKey Concept:\nGenioglossus protrude the tongue and make an elongated gutter on the dorsal surface of the tongue for the passage of food.', 'role': 'assistant'}]