While planets are smaller than stars, planets are generally larger than which of the following?
the stars they orbit around
the solar system
the galaxy they are contained within
the other bodies in a solar system

The other bodies in a solar system

Explanation:

Stars are generally bigger in size than the objects orbiting around them. Star is the object that holds all the object of a star system in a definite shape and makes all the objects orbit it due to its gravity. Of all these objects few are designated as planets as per the criteria laid down by the International Astronomical Union (IAU). One of the criteria is: "The planets orbit around the star and clear their orbit i.e. they are the biggest object in that region".

By this logic it is pretty evident that they are bigger than other objects in the star system (or in our case the solar system).

i think the answer would be reserve.