Which statement accurately describes the atoms of a specific element? i need to why j is the right answer

In an atom there is a central nucleus which contains protons and neutrons.

Outside the nucleus there are electrons placed in the atom

a) Indium: as given neutrons cannot be present in outside nucleus.

b) Scandium: the atomic number of scandium is 21 so it cannot have 45 electrons outside

c) Aluminum: it cannot have electrons inside the nucleus

d) Zn: as atomic number of zinc is 30 so yes it contains 30 protons inside the nucleus and 30 electrons outside the nucleus. : hence this statement is true.