<h2>The Professor mentioned that the UN P5 have ultimate authority over all of the following EXCEPT: The UN operating budget. The answer is b</h2>
Explanation:
In 1945, the main central mission of United Nations was to maintain international peace and security, that came after the devastation of the Second World War.
The UN government tried to prevent conflict, helps parties to change conflict into peace, and peacekeeping.
It also creates the conditions to allow peace to hold and flourish. These activities often overlap and should strengthen each other to make it effective.
The UN Security Council has the primary responsibility for international peace and security. It play major and complementary roles, along with other UN offices and bodies.