The number of pixel column divided by the number of scan lines that can be displayed by the system, is called _______________.

Correct option is C

The aspect ratio in computer graphics is the ratio of the number of pixel columns (horizontal resolution) to the number of scan lines or pixel rows (vertical resolution) that can be displayed by a system. It describes the relative width and height of the display or image and is generally expressed as Width : Height.
For example, a display with 1920 pixel columns and 1080 scan lines has an aspect ratio of 1920:1080, which simplifies to 16:9. Maintaining the appropriate aspect ratio prevents images from appearing stretched or compressed.
Information Booster
1. Aspect Ratio
· Aspect ratio is calculated as:
​$$\text{Aspect Ratio}= \frac{\text{Number of Pixel Columns}} {\text{Number of Scan Lines}}$$​​
· It represents the width-to-height relationship of a display or image.
· Common aspect ratios include 4:3, 16:9 and 21:9.
· It is important in displaying images and video without geometric distortion.
2. Effect of Aspect Ratio
· If the original and display aspect ratios are different, an image may appear stretched or compressed.
· For example, displaying a 16:9 image in an incorrectly configured 4:3 space can distort its proportions.
· Graphics systems therefore often preserve the original aspect ratio during scaling.
3. Pixel Columns and Scan Lines
· Pixel columns represent the horizontal dimension of the raster display.
· Scan lines represent the vertical dimension.
· Together, they determine the spatial resolution of the display, such as:
1920 × 1080
· Here, 1920 is the number of columns and 1080 is the number of scan lines.
4. Aspect Ratio vs. Resolution
· Resolution specifies the actual number of pixels, such as 1920 × 1080.
· Aspect ratio specifies the proportional relationship between those dimensions.
· Two displays can have different resolutions while maintaining the same aspect ratio.
Additional Knowledge
· Option (a) Pixmap — Incorrect: A pixmap (pixel map) is a representation of an image as a two-dimensional array of pixel values. It describes image data rather than the width-to-height ratio of the display.
· Option (b) Bitmap — Incorrect: A bitmap represents an image using a collection of bits or pixel values. The term is related to how image information is stored or represented, not to the ratio of columns to scan lines.
· Option (d) Depth — Incorrect: Color depth (pixel depth) refers to the number of bits used to represent the color or intensity of a pixel. For n bits per pixel, up to: $$2^n$$​ different values can be represented.