- Section 129(1) of CrPC empowers an Executive Magistrate or Officer-in-Charge of a police station to command dispersal of an unlawful assembly, or any assembly of five or more persons likely to cause a disturbance of the public peace. - Option A (unlawful assembly) and Option B (assembly of five or more persons likely to cause a disturbance of public peace) are explicit grounds for commanding dispersal. - Option D describes a situation after a command has been given, which may lead to the use of force, but the initial command is based on the assembly being unlawful or likely to disturb public peace. - Option C, assembly likely to invite more persons to join, is not a direct ground for ordering dispersal using civil force under Section 129(1) unless this gathering or its potential increase also makes it unlawful or likely to cause a disturbance of public peace.