The question is a geographical one, requiring knowledge of the locations of former Soviet Union countries.

Option 1 suggests that the countries in order are Tajikistan, Turkmenia, Uzbekistan, Kirgizia, Kazakhstan. However, this is incorrect as Tajikistan and Turkmenia are not the first and second countries, respectively.

Option 2 lists the countries as Turkmenia, Kirgizia, Tajikistan, Uzbekistan, Kazakhstan. This is also not accurate as Turkmenia is not the first country, and Kirgizia is not the second.

Option 3 orders the countries as Kazakhstan, Uzbekistan, Tajikistan, Kirgizia, Turkmenia. This arrangement can`t be correct as Uzbekistan is not the second country and Tajikistan is not the third.

Option 4 is the correct answer. It lists the countries as Kazakhstan, Turkmenia, Uzbekistan, Kirgizia, Tajikistan. Each of these corresponds accurately to the countries labelled 1 through 5 on the map, providing the correct sequence. Hence, the matching of numbers with correct countries is the reason behind option 4 being correct.