The correct option is B Eardrum is a part of the inner ear.
The cochlea is a part of the inner ear involved in hearing. It is a coiled tube or spiral-shaped cavity.
The middle part of the ear has three small bones, which amplify the vibrations coming from the eardrum.
The outer part of the ear consists of “pinna”, which collects the sound.
The statement: "Eardrum is a part of the inner ear." is not correct, as the eardrum is a part of the middle ear.