Question

which of the following is connected to the nasopharynx by the auditory (eustachian) tube?
a inner ear
b cochlea
c middle ear
d outer ear

Explanation:

The eustachian tube connects the middle - ear to the nasopharynx. It helps in equalizing air pressure between the middle ear and the environment. The inner ear contains structures like the cochlea and is not directly connected to the nasopharynx by the eustachian tube. The outer ear is separated from the middle ear by the tympanic membrane and is not connected to the nasopharynx via the eustachian tube.

Answer:

C. Middle ear