The correct options are
B Central Government: It can try to solve inter-state problems.
C Police: By maintaining a line of control in an area of conflict.
D Judiciary: By settling disputes between different parties to a conflict.
The government, the police and the judiciary have the legal power to participate in conflict-resolution and make temporary or permanent rules over a period of time. Non-Governmental Organisations can only participate in a protest and cannot directly change the laws and rules of a region.