Answer: D. Orbit
Step-by-step explanation:
The orbit is the cavity or bony socket of the skull in which the eye and its appendages are situated, it may also include the contents of the socket. The sphenoid bone is an unpaired bone of the neurocranium. It is situated in the middle of the skull towards the front.
At the apex of the orbit, next to the optic foramen is part of the sphenoid bone called the sphenoid strut.
Therefore the spheroid strut can be radiographed from the orbit as it is behind it.