a charge of Qcoulomb is placed on a solid piece of metal of irregular shape.the charge will distribute itself....a-uniformly on the metal surface b- uniformly oon the surfa e of objet c- such that potential energy of the system is minised d-such that total heat loss is minimised

c is the correct option

uniformly on metal surface..... refer mechanism of conduction in metals

as the metal surface is irregular therefor surface charge density is to be considered it means the chrge distribution is non uniform .At the pointed surface of the metal more charge will be accumulated (as the radius of curvature at that point will be less as compared to the flat surface) so that 

surface charge density multiplied by radius of curvature remains constant throughout the metal surface.