19. What exposure error is eliminated if the central ray is directed between the interproximal areas? D PLEASE SELECT A. Elongation B. Foreshortening C. Horizontal overlapping D. Vertical overlapping

## Step 1<br />The problem is asking about the type of exposure error that is eliminated when the central ray is directed between the interproximal areas. The options provided are elongation, foreshortening, horizontal overlapping, and vertical overlapping.<br /><br />## Step 2<br />The central ray is the imaginary line that passes through the center of the image receptor. When the central ray is directed between the interproximal areas, it means that the X-ray beam is directed in such a way that it passes through the spaces between the teeth.<br /><br />## Step 3<br />This positioning of the central ray helps to eliminate the error of horizontal overlapping. Horizontal overlapping occurs when the X-ray beam is directed too high or too low, causing the teeth to appear overlapped or distorted.<br /><br />## Step 4<br />By directing the central ray between the interproximal areas, the X-ray beam is directed in a way that minimizes the risk of horizontal overlapping. This is because the X-ray beam is not directed too high or too low, but rather passes through the spaces between the teeth.