Which of the following measurement defines a measurement in pixels?

px
in
em
pt

The correct answer is A. px.

A pixel (short for picture element) is the smallest element of a digital image or video displayed on a computer monitor or television screen. Pixels are arranged in a two-dimensional grid, and each pixel has a specific color and brightness value. The number of pixels in an image or video determines its resolution.

The other options are not measurements in pixels.

  • In is an imperial unit of length equal to 1/12 of a foot or 2.54 centimeters.
  • Em is a relative unit of length in typography that is equal to the font size of the current font.
  • Pt is a unit of length in typography that is equal to 1/72 of an inch.