This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
Most common congenital middle ear abnormality: 
Select and explain. 
A. Absent footplate of stapes, B. Fixation of footplate of stapes, C. Oval window abnormality, D. Absent long process of incus
B: Fixation of footplate of stapes
Answer: B: Fixation of footplate of stapes 
Explanation: (b) Fixation of footplate of stapes(Ref. Scott Brown, 8th ed., Vol 2, page 108)According to Teunissen and Cremers classification, the most common congenital anomaly of the middle ear is fixation of footplate of stapes.