The correct answer is (d) Tunisia.
Najla Bouden Romdhane was nominated as the first female Prime Minister of Tunisia on 29 September 2021. She is a geophysicist and engineer who has held a number of government positions, including Minister of Higher Education and Scientific Research. She is a member of the Ennahda Movement, a moderate Islamist party.
Nigeria has had two female heads of state, both of whom were presidents: Olusegun Obasanjo (1999-2007) and Goodluck Jonathan (2010-2015).
New Zealand has had one female head of state, Queen Elizabeth II, who has been the Queen of New Zealand since 1952.
Finland has had one female head of government, Anneli Jäätteenmäki, who served as Prime Minister from 2003 to 2004.