Q. Which of the following sites has been declared “Endangered Heritage Site” by UNESCO in the 39th session of the World Heritage Committee in Bonn, Germany in 2015?

Answer of this question "Which of the following sites has been declared “Endangered Heritage Site” by UNESCO in the 39th session of the World Heritage Committee in Bonn, Germany in 2015?", here are 4 choices for this question : City of Potosi , Tom of Askia , Abu Mena , Old City of Sana’a.
Answer Is "Old City of Sana’a".