Which of the following is not true concerning Danhauser's painting Liszt at the Piano from 1840 Liszt is seen performing a piano duet with Chopin. It portrays Liszt at the piano looking at a monumental marble bust of Beethoven perched on the piano. It illustrates perfectly the romantic era infatuation with the Beethovian "ideal". It pictures a Parisian salon filled with some of the greatest artists of the day. Beethoven's bust is seen against a window which frames a roiling and turbulent sky.

yes that is correct and good

explanation:

relief sculpture - images are set against a flat background.

a coin is a good example: the inscription, the date, and the figure are slightly raised above a flat surface. the ancient egyptians sometimes carved figures into a flat surface.  

pro: they take significantly less time to make and do not require as much tools or skills as free-standing

cons: not nearly as realistic, as it is not fully 3-d, and does not have the details that a free-standing one does.

freestanding sculptures (also called  carved in the round) are not attached to any  background.   they are 3-dimensional  and fully rendered.