The correct option is B Security Council
The United Nations Security Council (UNSC) is the organ responsible for maintaining international peace and security. Therefore, it is considered to be one of of the most powerful and important organs. The Security Council initially consisted of 11 members. It now comprises of 15 members: five permanent members and ten non-permanent members. The five permanent members are France, UK, Russia, China, and USA. They have the power to block any resolution or decision, regardless of the majority decision of the council. This power is called the veto power.