Dsus4 - Re Suspended Fourth

In music theory, D suspended fourth chord is built on D-G-A formation: root-perfect fourth-major second. This suspended fourth chord has a formation D-A-D-G from basses to trebles in the guitar.

This suspended chord may be derived from a major triad or minor triad. In music theory, suspended fourth chords are built by three different notes and chords' suspend function is concluded by exchanging third interval to a perfect fourth interval from root. These chords' main function is giving a suspend and resolution effect to its original(expected) triad form.