The heaviest particle among all the four given particles isANeutronBMesonCProtonDElectronAnswer: A. NeutronRead Explanation:Neutron: Heaviest particleProton: Slightly lighter than a neutronMeson: Falls between the mass of a proton and an electronElectron: Lightest particle among the options Note:Neutrons make up the majority of the mass of the nucleus and are heavier than electrons and protons.Mesons are unstable subatomic particles composed of a quark and an antiquark. Open explanation in App