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: ENT
[{'content': 'Quadrilateral cartilage is attached to all except - \nSelect and explain. \nA. Ethmoid, B. Vomer, C. Sphenoid, D. Maxilla', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Qudrilateral (septal) cartilage is one of the principal constituent of nasal septum.\nIt is attached to nasal bones, ethmoid bone, vomer, and maxilla.', 'role': 'assistant'}]