.......... has been appointed as the Secretary General of United Nations on 1 January 2017.

Antonio Guterres

The correct answer is Option (2) → Antonio Guterres

António Guterres, a Portuguese diplomat and politician, was appointed as the Secretary-General of the United Nations on 1 January 2017. He succeeded Ban Ki-moon and became the ninth Secretary-General of the UN. Guterres has a background in political and diplomatic roles, including serving as the Prime Minister of Portugal and as the United Nations High Commissioner for Refugees (UNHCR). His appointment as Secretary-General marked a new phase of leadership in the UN, with a focus on addressing global challenges such as climate change, conflict resolution, human rights, and sustainable development.