The correct answer is: the Security Council, the General Assembly and the Economic and Social Council.
The UN Security Council (UNSC) is the body of the UN responsible of peace and international security. It includes 15 member countries of which five are permanent members who have veto power over tis resolutions (Russia, the United Kingdom, France, China, and the United States).
The UN General Assembly is another one of the six main organs of the UN. All its members have equal representation and it oversees the UN budget, the appointment of non-permanent members of the Security Council and of the UN Secretary General.
The UN Economic and Social Council has 54 members. It is responsible of the coordination of the 15 UN specialized agencies. It serves also as a forum for the discussion of international socioeconomic policies.