Answer:
The correct answer is option C. "In the lower 1/3 of the orbits".
Step-by-step explanation:
The missing options of this question are
A. In the center of the orbits
B. In the upper 1/3 of the orbits
C. In the lower 1/3 of the orbits
D. In the lower 1/8 of the orbits
The correct answer is option C. "In the lower 1/3 of the orbits".
The petrous pyramids is a part of the temporal bone that separates the middle and posterior cranial fossae. In a properly positioned PA axial (Caldwell) projection radiograph, the petrous pyramids will be located in the lower 1/3 of the orbits. The PA axial (Caldwell) projection is used to see the frontal bones of the cranial fossae, which will let the petrous pyramids positioned in the lower 1/3 of the orbits.