Sense Organs

• The ear drum (tympanic membrane) receives sound vibrations and passes them to the ossicles (the small bones in the middle ear). The ossicles then transmit these vibrations to the oval window, a membrane-covered opening that leads to the inner ear (cochlea).
• The oval window is the correct point where the vibrations from the ossicles are transmitted into the cochlea, which then transduces the vibrations into electrical signals for the auditory nerves.

The correct answer is (C) : Oval window.