The question presents three areas of conflict and matches them with the countries they are located in. The task is to determine how many of these pairings are correct.

1. Donbas: Syria - This pairing is incorrect. The Donbas region is a contested area in Eastern Ukraine, not Syria. So, this does not match the right country.

2. Kachin: Ethiopia - This pairing is also incorrect. Kachin State is actually located in Myanmar, not Ethiopia. Kachin is in the northernmost part of Myanmar and has seen several conflicts, especially related to ethnic and political tensions. Hence, this pair also provides incorrect information.

3. Tigray: North Yemen - This is also not a correct pairing. The Tigray region is in the northern part of Ethiopia, not in North Yemen. It has been in the news due to the armed conflict between Tigray People`s Liberation Front and the Ethiopian government.

Therefore, none of the pairs provided in the question are correctly matched, which makes option 4 (None) the correct answer.

Since none of the pairings are correct, options 1 (Only one), 2 (Only two), and 3 (All three) are incorrect.