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
[{'content': 'External nose is formed from: \nSelect and explain. \nA. 3 paired+3 unpaired cailages, B. 3 paired + 1 unpaired cailages, C. 3 paired +4 unpaired, D. 1 paired+1 unpaired', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 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.', 'role': 'assistant'}]