This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nose and paranasal sinuses, Subject name: ENT
External nose is formed from: 
Select and explain. 
A. 3 paired+3 unpaired cailages, B. 3 paired + 1 unpaired cailages, C. 3 paired +4 unpaired, D. 1 paired+1 unpaired
B: 3 paired + 1 unpaired cailages
Answer: B: 3 paired + 1 unpaired cailages 
Explanation: 3 paired+ 1 unpaired cailages External nose is made up of bony framwork which forms upper third pa and cailaginous forms lower two-third pa framwork. cailages of nose: -paired upper lateral nasal cailages -paired lower nasal cailages -lesser alar cailages-2 or more in number -unpaired septal cailage. Ref.Dhingra 5/e, p 149,150;6/e,p 134.