Step 1: UN Membership Process
- Admission of a new state requires approval by both the Security Council and the General Assembly.
- First, the Security Council recommends admission.
- Then the General Assembly votes and admits the state by a majority vote.
Step 2: Other options
- Unanimous decision is not required in Security Council; majority or no veto is sufficient.
- The General Assembly cannot admit a state without Security Council recommendation.
- Secretary-General does not have direct admission powers.
Hence, option (A) correctly describes the UN admission process.