# Which bind positive charged protons?

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A proton is a subatomic particle with the symbol p or p+ and a positive electric charge of $$1$$ elementary charge. One or more protons are present in the nucleus of each atom. Protons and neutrons are collectively referred to as "nucleons". Since all protons are charged positively, there is a strong repulsive force between protons. Then which of the following binds positively charged protons in the atomic nucleus by overcoming the electric repulsive force?

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