General Assembly
is the main deliberative, policymaking, and representative organ of the UN. All 193 member states of the UN are represented in the General Assembly, making it the only UN body with universal representation.
Security Council
has primary responsibility, under the UN Charter, for the maintenance of international peace and security. It has 15 members – 5 permanent and 10 non-permanent members.
ECOSOC
is the principal body for coordination, policy review and dialogue, and recommendations on economic, social, and environmental issues, as well as the implementation of internationally agreed development goals.