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': 'The mucoperichondrial flap in septoplasty is made on \nSelect and explain. \nA. Alar cailage, B. Septal cailage, C. Maxilary spine, D. Sphenoidal spine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The mucoperichondrial flap is elevated on one side over the quadrangular septal cailage.Indication for surgery in DNS- Symptomatic DNS- nasal obstruction, epistaxis, headache, recurrent sinusitis.In SMR, the mucoperichondrial flap is elevated on both the sides of the septal cailage.Incision- Freer`s incision in septoplasty, Killian`s in SMR.Ref: Hazarika; 3rd ed; Page no: 283', 'role': 'assistant'}]