Correct Option: B. One month Detailed Explanation: The United Nations Security Council (UNSC) is one of the six principal organs of the United Nations, responsible for maintaining international peace and security. One of the key features of the UNSC is its rotating presidency.

1. Understanding the Presidency: The presidency of the UNSC rotates among its 15 member states. Each member state holds the presidency for a specific period, which is designed to ensure that all members have an opportunity to lead and influence the Council's agenda.
2. Duration of Tenure: The tenure of the President of the UNSC is one month. This monthly rotation allows for a diverse range of perspectives and approaches to international issues, as different countries bring their unique diplomatic styles and priorities to the table.
3. Rotation Schedule: The rotation is predetermined and follows the English alphabetical order of the member states' names. For example, if the United States holds the presidency in January, the next country in alphabetical order, such as the United Kingdom, would take over in February.
4. Responsibilities of the President: The President of the UNSC has several important responsibilities, including:
5. Setting the agenda for the month.
6. Presiding over meetings and discussions.
7. Representing the UNSC in its relations with other UN bodies and external entities.
8. Ensuring that the Council's decisions are implemented.
9. Significance of the Monthly Rotation: This system of a one-month presidency helps to prevent any single country from dominating the Council's agenda and decisions for an extended period. It promotes equality among member states and encourages collaborative decision-making.

Why Other Options Are Incorrect:

• Option A: Two years: This option is incorrect because a two-year term would allow a single country to hold significant power and influence over the UNSC for an extended period, which contradicts the principle of equal representation and rotation among member states.
• Option C: Six months: While six months might seem like a reasonable duration, it still allows for too much continuity and potential dominance by one country. The one-month term is specifically designed to ensure that no single member can exert prolonged influence.
• Option D: One year: Similar to the six-month option, a one-year term would provide too much stability in leadership, which could lead to biases in decision-making and a lack of fresh perspectives. The one-month rotation is crucial for maintaining a dynamic and responsive UNSC.

Revision Summary:

• The President of the UN Security Council serves a term of one month.
• The presidency rotates among the 15 member states in alphabetical order.
• This system promotes equality and prevents any single country from dominating the Council.
• The President's role includes setting the agenda, presiding over meetings, and representing the Council externally.