What is a normal finding in a Rinne test?

In a Rinne test, a tuning fork is struck and placed on the mastoid bone (bone conduction) and then beside the ear (air conduction). Normal hearing is indicated when air conduction (AC) is greater than bone conduction (BC). This means that a person with normal hearing can hear the sound longer when it is transmitted through the air than through the bone.

Option C, which states that AC is greater than BC, aligns with this understanding of normal hearing. This finding demonstrates that the auditory pathway is functioning correctly and indicates that air conduction is the preferred mode of hearing when compared to bone conduction.

In contrast, the other options reflect situations that either suggest conductive hearing loss (where BC would be greater than AC) or other abnormalities that would not be expected in a healthy individual with normal auditory function.