For HD resolution, what pixel configurations are typically used?

The correct answer is rooted in the standard definitions of high-definition (HD) resolution. HD resolution typically includes configurations starting from 720p and upward, with 1080p being the next standard resolution.

720p, which has a resolution of 1280x720 pixels, is considered the lower tier of HD quality and delivers a progressive scan image. This provides a clearer and smoother image compared to standard-definition resolutions such as 480p.

1080p, on the other hand, offers a higher resolution of 1920x1080 pixels and delivers an even sharper and more detailed picture, also in progressive scan format. This makes it ideal for applications requiring superior video quality, such as Blu-ray discs and high-definition streaming services.

Understanding these configurations helps clarify why 720p and 1080p define the high-definition category, as they align with industry standards for HD content. Other options listed reference either standard-definition formats or interlaced formats that don't meet the criteria established for HD resolution.