Which of the following secretary general of the UN was the former Prime Minister of Portugal and also the President of the Socialist International from 1999 to 2005?

António Manuel de Oliveira Guterres

António Manuel de Oliveira Guterres (2017- ) Portugal; former Prime Minister of Portugal from 1995 to 2002; was the United Nations High Commissioner for Refugees during 2005–2015; President of the Socialist International from 1999 to 2005. He is serving as the ninth Secretary–General of the United Nations.