Pope Benedict XVI hails from

Germany
Italy
Vatican City
Poland

The correct answer is (a) Germany.

Pope Benedict XVI was born Joseph Aloisius Ratzinger on April 16, 1927, in Marktl am Inn, Germany. He was ordained a priest in 1951 and was made a cardinal in 1977. He served as Prefect of the Congregation for the Doctrine of the Faith from 1981 to 2005. He was elected Pope on April 19, 2005, and resigned on February 28, 2013.

Option (b), Italy, is incorrect because Pope Benedict XVI was born in Germany.

Option (c), Vatican City, is incorrect because Vatican City is a city-state that is the seat of the Catholic Church. The Pope is the head of state of Vatican City, but he is not from Vatican City.

Option (d), Poland, is incorrect because Pope Benedict XVI was born in Germany.