Which of the following statements regarding mounting and orientation of radiographs is correct?

A) Anterior periapical radiographs are placed in the oral cavity with the long dimension of the image receptor positioned horizontally.
B) Size 1 image receptors are often used to radiograph the anterior regions.
C) Size 4 image receptors are often used to radiograph the posterior regions.
D) Posterior periapical radiographs are placed in the oral cavity with the long dimension of the film packet positioned vertically.

B
Explanation: A) When mounting a full mouth series of radiographs, it is helpful to use film sizes and orientation in the oral cavity to help with the mounting process.
B) When mounting a full mouth series of radiographs, it is helpful to use film sizes and orientation in the oral cavity to help with the mounting process.
C) When mounting a full mouth series of radiographs, it is helpful to use film sizes and orientation in the oral cavity to help with the mounting process.
D) When mounting a full mouth series of radiographs, it is helpful to use film sizes and orientation in the oral cavity to help with the mounting process.