Match the following columns and select the correct option.
| Structure | Description |
|---|---|
| (a) Organ of Corti | (i) Connects the middle ear and pharynx |
| (b) Cochlea | (ii) Coiled part of the labyrinth |
| (c) Eustachian tube | (iii) Attached to the oval window |
| (d) Stapes | (iv) Located on the basilar membrane |