_________ involves synchronisation of the different actions or efforts of the various units of an organization by providing the requisite amount, quality, timing and sequence of efforts which ensures that planned objectives are achieved with a minimum of conflict.

Option 1 -> Planning involves setting objectives and determining courses of action for the future, but does not primarily focus on synchronizing different units' efforts.

Option 2 -> Organising deals with arranging resources, defining roles and establishing structural relationships, rather than ongoing synchronization of efforts.

Option 3 -> Controlling focuses on monitoring performance against standards and taking corrective actions, not on harmonizing different units' actions.

Option 4 -> Coordination is the management function that specifically ensures synchronization of different units by harmonizing the amount, quality, timing and sequence of efforts to achieve objectives with minimum conflict.

Hence, Option 4: Coordination -> Coordination is the essence of management that binds all functions together by ensuring that different departments, units and individuals work in harmony. It synchronizes efforts by providing proper timing, sequence, and quality of work across various organizational units, thereby minimizing conflicts and achieving planned objectives efficiently. -> correct