This question checks general awareness of world trade and shipping, specifically which port led the world in container traffic around 2007.
The correct option is Port of Singapore, since it led the world in container throughput at the time this paper was set.
Let's summarize:
So the world's busiest port, as referred to in this question, was the Port of Singapore.
In November 2023, which state government declared a fish named “Ghol” as the state fish?