Which interaction is responsible for the force of attraction between the particles in a salt crystal? proton-proton proton-electron neutron-electron electron-electron

Option (b) is the correct answer.

Explanation:

An atom consists of three sub-atomic particles, that is, there are protons, neutrons, and electrons in an atom.

Protons are positively charged, neutrons have no charge and electrons have a negative charge.

It is known that opposite charges attract each other. And a salt contains atoms of two or more different elements.  

Therefore, there occurs attraction between a proton and an electron which is responsible for the force of attraction between the particles in a salt crystal.

a corroding iron, if that's one of your choices

a is the correct answer