The correct answer to this question is B) Each particle exists inside an atom.
EXPLANATION:
Before going to answer this question , first we have to understand the nature of electron and neutron.
Electrons and neutrons are the subatomic particles which are present inside the atom.
Electron is that subatomic particle which is present in the extra nuclear part of the atom, and it moves around the nucleus in different permitted, stationary orbits. The charge of electron is negative.
The neutron is that subatomic particle which is present in the nuclear part of the atom along with protons. The charge of proton is positive and the neutron is neutral in nature.
Hence, the correct option of this question is that both electrons and neutrons are present inside the atom.
