This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
Otospongiosis causes 
Select and explain. 
A. U/L conductive deafness only, B. B/L conductive deafness only, C. U/L sensorineural deafness only, D. B/L mixed conductive and sensorineural deafness
D: B/L mixed conductive and sensorineural deafness
Answer: D: B/L mixed conductive and sensorineural deafness 
Explanation: .