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
Austin's classification for ossicular chain defects depends on - 
Select and explain. 
A. Malleus head and stapes footplate, B. Malleus handle and stapes suprastructure, C. Malleus head and stapes suprastructure, D. Malleus head and stapes head
B: Malleus handle and stapes suprastructure
Answer: B: Malleus handle and stapes suprastructure 
Explanation: Austin - Kartush classification of ossicular chain defect

To predict reconstructive success, the status of the middle ear and ossicular chain needs to be assessed.
The Austin - Kartush classification of ossicular chain defects provides a method for defining pre-reconstructive ossicular status.
Austin's original classification had four groups:-


Malleus handle and stapes suprastructure present
Malleus handle present, stapes suprastructure absent
Malleus handle absent, stapes suprastructure present
Malleus handle and stapes suprastructure absent


Kartush modified this scheme by adding three classes:-

E.  Intact ossicular chain
F. Ossicular head fixation
G. Stapes fixation