Who is the composer of the Nocturne in E Flat Major, Op. 9, No. 2?

The composer of the Nocturne in E Flat Major, Op. 9, No. 2 is indeed Frédéric Chopin. This piece is one of Chopin's earliest nocturnes, composed in the early 1830s, and it showcases his unique style that combines lyrical melodies with expressive harmony. Chopin is renowned for his contributions to piano music, and his nocturnes, including this one, are celebrated for their delicate beauty and emotional depth.

In the context of the other composers listed, while Beethoven and Schubert made significant contributions to classical music, they did not compose this work. Jules Massenet, known for his operatic compositions, also did not write this nocturne. Each of these composers has a distinct musical style that differs from Chopin's Romantic approach, particularly in the genre of nocturnes, which Chopin helped to popularize.