What is the best way to play a song with the key of G using a capo on the 4th fret?

To play a song in the key of G using a capo on the 4th fret, you would need to play the chords D, A, and Bm as if you were in the key of G. This transposition allows you to play the song in the key of G while using the capo on the 4th fret.