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
Attenuation reflex is lost in case of 
Select and explain. 
A. Stapedial palsy, B. Glomus tumor, C. Internal ear pathology, D. Malingerers
A: Stapedial palsy
Answer: A: Stapedial palsy 
Explanation: It is based on the fact that a loud sound, 70-100 dB above the threshold of hearing of a paicular ear, causes bilateral contraction of the stapedial muscles which can be detected by tympanometry. Stapedial reflex is elicited with a sound of 70-100 dB SL Absence of Stapedial reflex when hearing is normal indicates lesion of the facial nerve, proximal to the nerve to stapedius. Stapedial reflex becomes absent when stapes is fixed.