Which statement/s is/are true?

Soap acts as an emulsifier between grease (dirt) and water (dispersion medium).
Repulsion between like charges on the surface of colloidal particle is responsible for the stability of colloids. When two oppositely charged colloids are mixed, there will be mutual coagulation.
During peptization, electrolytes bind (get adsorded) to the solid dispersed phase and disperse them into colloidal particles.