Answer : Option D) Proton and Neutron.
Explanation : The part of the atom that carries a positive charge is the proton, and the part that carries a neutral charge is the neutron.
A proton is a small subatomic particle, denoted by symbol [tex] p or p^{⁺} [/tex], with a positive electric charge of +1 e elementary charge and a mass which is slightly less than that of a neutron. It is located at the center o atomic nucleus along with neutron. The number of protons are equal to the number of electrons of that atom but are in opposite charges.
A neutron is a subatomic particle of an atom which is of the same mass as that of proton but without an electric charge, it is present in all atomic nuclei except those of ordinary hydrogen. It is also located at the center of an atomic nucleus.
