Which of the following is a ruler measurement option in Photoshop?

• A. Points
• B. Picas
• C. Pixels
• D. Inches

Answer: (C)

Photoshop’s rulers can be shown in several units, and the one that maps most directly to the digital workspace is the pixel unit. Pixels measure the image in terms of the actual dots that make up the on-screen display, so using pixels for ruler measurements lets you place and resize elements with exact, screen-based precision. This is especially helpful when you’re aligning layers, guides, or crops to a grid that corresponds to how the image will be viewed digitally.

Other options like points and picas are typographic units used mainly in print/layout contexts, where precise character sizing matters. Inches and other physical units relate to print size and depend on the document’s resolution, which can complicate on-screen accuracy. Because pixels align with the digital canvas and screen rendering, they’re the most practical choice for ruler measurements in Photoshop when working in a digital format.