Find the correct statement about Inner ear

The correct answer is made up of bony and membranous segments.

Explanation:
The inner ear is an intricate structure consisting of two main parts:
1. The Bony Labyrinth: A series of cavities in the temporal bone of the skull.
2. The Membranous Labyrinth: A system of communicating membranous ducts and sacs housed inside the bony labyrinth.

Let's analyze why this makes the selected option correct and others incorrect:
- Bony and membranous segments: The inner ear is indeed divided anatomically into these two segments, with the membranous labyrinth suspended within the bony labyrinth.
- Membranous labyrinth encloses bony labyrinth: This is incorrect because the bony labyrinth is the outer shell that encloses the inner membranous labyrinth, not the other way around.
- Endolymph surrounds membranous labyrinth: This is incorrect. Perilymph surrounds the membranous labyrinth (filling the space between the bony and membranous labyrinths), while endolymph is contained inside the membranous labyrinth.
- Air-filled inner segment: This is incorrect because the inner ear is completely fluid-filled (containing perilymph and endolymph), unlike the middle ear which is air-filled.