In following question , a number series is given with one term missing. choose the correct alternative that will same pattern and fill in the blank space.1,6,15,45,66,91
Forty years after African colonies began emerging as nations, modern loyalties still often go first to the tribe. From Angola to Ethiopia, ethnic hatred has forced hundreds of thousands of people to flee their homes, making Africa the continent with the world's largest number of refugees.
Which of the following statements best summarizes the above ?