Which of the following is not a cause of a conductive hearing loss?

Which of the following is not a bone of the middle ear?

Sound waves enter the outer ear and vibrate the tympanic membrane, which causes the transmission of sound waves through the ossicles to the inner ear. In what order do the ossicles vibrate?

Which of the following structures is the main sensory organ associated with hearing?

Which of the following is not a function of the eustachian tube?