<prompt> A 38 year old gentleman repos of decreased hearing in the right ear for the last two years. On testing with a 512 Hz tuning fork the Rinnes test without masking is negative on the right ear and positive on the left ear. With the Webers test the tone is perceived as louder in the left ear. This patient MOST likely has:Right conductive hearing lossRight sensorineural hearing lossLeft sensorineural hearing lossLeft conductive hearing loss  <response>: In unilateral sensorineural hearing loss, when hearing test is conducted with 512Hz tuning fork, the Rinnies test without masking may be false or negative but Webers test will be lateralized to the normal ear. In this patient with right sided hearing loss, Webers test was lateralized to the left ear so this ear is normal and patient has right sided sensorineural hearing loss. When unilateral conductive deafness is present in the and the other ear is normal, sound of the tuning fork lateralizes in the ear with the conductive hearing loss. Rinnies test is positive when air conduction is greater than bone conduction and it is negative when bone conduction is greater than air conduction. Negative Rinnies test indicate conductive deafness. An exception is when one ear is not hearing at all, when we get a false negative Rinnies test. 