Question

Which of these cities is Timbuktu?
a. A
b. B
c. C
d. D

Answer 1

Since you don't provide picture, find the spot that is  located on the west part of the Mali, On top of the River Niger and below the Sahara desert

Answer 2

Timbuktu is a small city located in Mali, capital to the Timbuktú region, is located 20 km north of the Niger River and flourished in the past a trade center.