This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diagnostic and operative ENT, Subject name: ENT
All of the following true of submucous resection operation for DNS except 
Select and explain. 
A. Indicated in septal detion, B. Mucoperichondrium is removed, C. Preferable done after 16 years of age, D. Done in some cases of epixtaxis
B: Mucoperichondrium is removed
Answer: B: Mucoperichondrium is removed 
Explanation: SMR operation is indicated in septal detion, recurrent epistaxis from scleral spur It is done after 16years of age, before 16 years septoplasty should be done In SMR, cailage and bone are removed and preserving mucoperichondrium Re: Textbook of Ear, Nose and Throat, Dhingra, 6th Edition; Pg no: 413