KV 285, D major: b. Adagio

Whose song is KV 285, D major: b. Adagio?

Artist Album
Mozart
W A Mozart: Flute Quartets - Jed Wentz & Ensemble Musica ad Rhen
W. A. Mozart
Flute Quartets KV 285, 285a+b, 298, Andante KV 315