The equation of the reaction between 2 moles of proton and 2 moles of neutron producing Helium particles is a practical suggestion of

(a)existence of neutral particle.
(b)alpha-particles has no relationship with nucleus
(c)electron is not part of helium.
(d)nucleus is neutralize

The equation you are referring to represents a type of nuclear reaction called nuclear fusion, which occurs in stars and thermonuclear power plants. The equation you mentioned does not accurately represent the fusion reaction between protons and neutrons to produce helium particles. However, we can analyze the given options to determine the practical suggestion of this type of reaction.

(a) The existence of neutral particles: Protons and neutrons, which are present in the atomic nucleus, are not neutral particles individually. Protons carry a positive charge, while neutrons have no charge at all. Therefore, this equation does not directly suggest the existence of neutral particles.

(b) Alpha-particles have no relationship with the nucleus: Alpha-particles are made up of two protons and two neutrons, which are the building blocks of atomic nuclei. Therefore, this equation does not suggest that alpha-particles have no relationship with the nucleus.

(c) Electron is not part of helium: Helium atoms consist of two protons, two neutrons, and two electrons in typical neutral conditions. However, the given equation does not involve electrons. The absence of electrons in the equation could suggest that it represents a nuclear reaction rather than an atomic reaction involving electrons.

(d) Nucleus is neutralized: This option seems to be the most reasonable suggestion based on the given equation. Since two protons fuse to form helium particles, the resulting helium nucleus will be electrically neutral since it contains two protons and two neutrons. Therefore, this equation suggests that the nucleus is neutralized.

In conclusion, option (d) - nucleus is neutralized seems to be the practical suggestion based on the given equation, even though the equation itself does not accurately represent the fusion reaction.