<prompt> Which of the following bones do not contribute to the nasal septum?SphenoidLacrimalPalatineEthmoid  <response>: The bony pa of Nasal septum is formed by: Vomer Perpendicular plate of ethmoid.however its margins receives contributions from nasal spine of frontal bone,the rostrum o the sphenoid,nasal crest of nasal,palatine and maxillary bones. REF.BDC vol 3 page no:241 