This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: ENT
SADE classification is for 
Select and explain. 
A. Rectraction of pars Tensa of Tympanic membrane, B. Rectraction of Pars Flaccida of Tympanic membrane, C. Tympanosclerosis, D. Perforation of Tympanic membrane
A: Rectraction of pars Tensa of Tympanic membrane
Answer: A: Rectraction of pars Tensa of Tympanic membrane 
Explanation: Sade classification: Retraction of Pars Tensa.
Tos classification: Retraction of Pars Flaccida