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
Indication of BAHA is 
Select and explain. 
A. Congenital canal atresia, B. Bilateral hearing loss, C. Sensorineural hearing loss, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Indications of BAHA (Bone anchored hearing aids):1.Conductive or mixed hearing loss due to CSOM, mastoid cavities, canal atresia, revision ossiculoplasty, otosclerosis, otitis externa2.Unilateral SNHL - Trauma, Viral infections, Sudden SNHL, Acoustic neuroma, Meniere`s disease, OtotoxicityRef: Hazarika; 3rd ed; Pg 85