The second section of a sonata is commonly called the

a. recapitulation.

b. development.

c. exposition.

d. coda.

Sonata form consists of three main sections - exposition, development, and recapitulation.

Your answer would be A. recapitulation.

Among the choices, B is the best answer. A sonata comprises of three main sections, these are exposition, development, and recapitulation. Exposition shows the theme and symphonious combination of the tonal material refines in the development and resolves in the recapitulation.