Answer:
(a) Proton, (c) Anti- top
Explanation:
Elementary particles are the particles without any sub-structure which means they are not composed of other particles.
The elementary particles are classified into three categories which are discussed below:
(1) Quarks: up, down, top, bottom, strange, and charm.
(2) Leptons: electrons, electron neutrino, muon, muon neutrino, tau, tau neutrino.
(3) Bosons: Guon, photons Z bosons, W bosons, Higgs.
The bottom is a quark which is also can be called anti-top. And proton consist of two up quarks and one down quark so it is also categorized in the quarks.
Therefore, proton, and anti top are categorized in the quarks.
