In the following question, select the related word from the given alternatives.
Nile : Africa :: Danube : ?

The correct answer is Option Europe.

Step-by-step Explanation:

1. Analyze the given pair:
The first pair is "Nile : Africa". The Nile is the longest river in Africa, located on the continent of Africa. Thus, the relationship established is between a major river and the continent in which it is located.

2. Apply the relationship to the second pair:
We need to find the continent corresponding to "Danube". The Danube is the second-longest river in Europe, flowing through central and eastern Europe.

3. Conclusion:
Following the same logic (River : Continent), Danube corresponds to Europe.