Respuesta :
Answer:
Option D is the correct answer.
Explanation:
An atom consists of nucleus and electrons revolving around it.
Nucleus is filled with proton and neutron.
So atom consists of electron, proton and neutron.
Magnetic domain is not present in an atom.
Option A,Option B and Option C are present in an atom.
Option D is not present in an atom.
So Option D is the correct answer.