Concept:Nucleons are the particles that reside inside the nucleus of an atom.
Explanation:In any atom, the nucleus is made up of only two types of particles: protons and neutrons.
These two particles together are collectively called nucleons.
Electrons are present outside the nucleus in energy shells, so they are not considered nucleons.
This applies to a neutral atom as well, because its nucleus still contains only protons and neutrons.
Thus, the correct group of nucleons is protons and neutrons.
Answer:Option A — protons and neutrons.