<prompt> True about external nose ?Upper 23 is bonyLower 13 is cailaginousSingle lateral cailageTwo nasal bones  <response>: Ans. isd i.e., Two nasal bones External nose has an osteocailaginous framework of which upper one - third is bony and lower two-third is cailaginous. Bony pa :- Consists of two nasal bones. Cailagenous pa :- Consists of two upper lateral cailages, two lower lateral cailages, two or more lessar alar or sesmoid cailages and a septal cailage. So, there are 3 paired and 1 unpaired cailages. 