Correct Answer: 2&4

Solution :

1. When someone is employed by any international organisations. He is regarded as a typical inhabitant of the nation to which they are a citizen, not of the "international area."
2. Travelers are considered as non-residents who are visiting a country for purposes such as studies, medical care, recreation, participation in sports, tourism and cultural events.
3. There are certain organisations, like the World Bank, WHO, IMF, and ILO, among others. These are treated as if they are citizens of the international community rather than the nation in which they are located.
4. Workers who go across international borders to work in a given nation are treated as citizens of that nation, not of the one in which they are employed.

Hence, Option C is correct.