Tunica propria is an inner layer of

Answer: Option A

Tunica propria is an inner layer of Ovariole.
The inner cell layer is called the tunica propria which is an elastic membrane containing fine fibrils. It surrounds the whole of the ovariole including the terminal filament.
It is a fairly thick layer at first, but when the ovariole enlarges during vitellogenesis it becomes stretched and very thin.