The third movement of the sonata form is referred to
as the as the Cadenza.
So, Option D is correct which is cadenza.
<span>The structure of Sonata form is based on
contrasting of musical ideas, consisting of three main sections: exposition,
development, and recapitulation and sometimes there is a fourth section which
is also included that is Coda. There are four movements in Sonata form.</span>
