Directions: In each of the questions below, four sentences are given which may or may not contain an error. Choose the one that is grammatically as well as contextually correct and meaningful. If all the sentences are correct, mark 'All are correct' as your answer.
1
In the past three decades 500 millions people have moved from the countryside into towns, the biggest such migration in human history.
2
The last of three prisoners who absconded from an open jail have been arrested.
3
Economic globalization provides one powerful example that will concern us throughout this book.
4
The disintegration of the Soviet Union deprived western intelligence agencies of there main enemies.
5
All correct