Question

Which of the following pieces if the one most frequently performed of all twentieth-century orchestral works?

Answer 1

Sonata II i believe 
correct me if im wrong 

Answer 2

Answer:

C. Concerto for Orchestra

Explanation:

    In terms of Concerts for piano and orchestra the 20th century does not surpass the 19th century as the concerts by Prokofiev, Bartók, Lutosławski by Schoenberg and Ravel are among the best piano concerts in history. The same can be said of the Concerts for violin and orchestra: the works of the genre of Prokofiev, Bartók, Berg, Ligeti, Shostakovich, Schoenberg and Sibelius occupy a position that does not make ugly between the violin concerts of the 19th and even the 20th century XVIII.