The sum of all electromagnetic forces between different particles of a system of charged particle is zero

The sum of all electromagnetic forces between different particles of a

1.	The sum of all electromagnetic forces between different particles of a system of charged particle is zero
Answer» only if all the particles are POSITIVELY CHARGED only if all the PARTICLESARE negatively charged only if HALF the particles are positively charged and half are negatively charged irrespective of the signs of the charges. Answer :D