A vertical, 0-degree angulation is used for exposure of which occlusal radiograph?

A) Maxillary posterior topographical
B) Mandibular anterior topographical
C) Mandibular posterior topographical
D) Mandibular cross sectional

D
Explanation: A) The patient's head position is such that the occlusal plane is perpendicular to the plane of the floor when exposing a mandibular cross-sectional radiograph. In other words, the patient should be reclined and the chin tipped upward. In this position, the vertical angulation will most likely be set at 0 degrees, allowing the x-rays to strike the image receptor perpendicularly.
B) The patient's head position is such that the occlusal plane is perpendicular to the plane of the floor when exposing a mandibular cross-sectional radiograph. In other words, the patient should be reclined and the chin tipped upward. In this position, the vertical angulation will most likely be set at 0 degrees, allowing the x-rays to strike the image receptor perpendicularly.
C) The patient's head position is such that the occlusal plane is perpendicular to the plane of the floor when exposing a mandibular cross-sectional radiograph. In other words, the patient should be reclined and the chin tipped upward. In this position, the vertical angulation will most likely be set at 0 degrees, allowing the x-rays to strike the image receptor perpendicularly.
D) The patient's head position is such that the occlusal plane is perpendicular to the plane of the floor when exposing a mandibular cross-sectional radiograph. In other words, the patient should be reclined and the chin tipped upward. In this position, the vertical angulation will most likely be set at 0 degrees, allowing the x-rays to strike the image receptor perpendicularly.