Option 1 states that one veto can stall a Security Council resolution, which is the correct statement about the veto power in the United Nations. The veto power is a privilege held by the five permanent members of the Security Council - China, France, Russia, the United Kingdom, and the United States. Each of these members has the ability to veto or reject any resolution brought before the Security Council, regardless of the level of support from other member countries. This means that if just one of the five permanent members chooses to exercise their veto, the resolution will be blocked and cannot be passed.

Option 2 is incorrect as the veto power is not a form of positive vote power. It is a mechanism that can be used to prevent the adoption of resolutions.

Option 3 is incorrect as the Secretary General does not have the power of veto. They carry out the decisions and resolutions passed by the Security Council.

Option 4 is also incorrect as only the five permanent members possess the veto power, while the other ten non-permanent members do not have this privilege.

In conclusion, option 1 accurately depicts the power of the veto in the United Nations.