<prompt> A 50 year old male patient complains of reduced mouth opening. Patient gives ho RTA 1 week back. Submentovertex view x-ray was taken which revealed zygomatic arch fracture. Which of the following is true regarding the central beam in this x-ray-It is parallel to the image receptorIt is directed from skull to the mandibleIt is centered about 2 cm anterior to a line connecting the right and left condylesIt is posterior to a line connecting the right and left coronoid process  <response>: Submentovertex view-The central beam is perpendicular to the image receptor, directed from below the mandible toward the vertex of the skull hence the name submentovertex, and centered about 2 cm anterior to a line connecting the right and left condyles.White and Pharoah, Oral radiology, ed 7th, pg-161 