The correct option is C Pluto
A celestial
body that orbits the sun has enough mass to assume a nearly round shape and has
not cleared the neighborhood around its orbit is a dwarf planet. It should not
be a moon. There are more than 100 dwarf planets. Pluto was earlier considered
as a planet, but now it is considered as a dwarf planet. Pluto has not cleared the
neighborhood around its orbit. It has orbital neighborhood with Kuiper belt
objects such as the plutinos.