Answer: Option D.. ora serrata.
Explanation: The serrated or wavy junction which lies between the ciliary body and the retina is called the orange serrata.
The simple non photosensitive area of the ciliary body to the is signified or marked by the ora serrata.
This junction marks the transition from the simple, non-photosensitive area of the ciliary body to the multi layered and complex photo synthetic area of the retina.