<prompt> The floor of the nasal cavity in children is made ofPalatine bone and vomerSphenoid and ethmoidNasal bone and maxillaPalatine bone and maxilla  <response>: The floor of the nasal cavities, which also form the roof of the mouth, is made up by the bones of the hard palate: the horizontal plate of the palatine bone posteriorly and the palatine process of the maxilla anteriorly.Refer: Nelsons Textbook of Pediatrics, SAE, 1st edition, pg no. 2007 