Explanation
- A
Only one
Only one. All three conflict–country pairs are wrong.
- B
Only two
Only two. Donbas is Ukraine; Kachin is Myanmar; Tigray is Ethiopia.
- C
All three
All three. Each country column is false.
- D
None
None. Syria, Ethiopia and North Yemen are the wrong tags.
Summary. Official key is (d) none. Donbas is in Ukraine, not Syria. Kachin is in Myanmar, not Ethiopia. Tigray is in Ethiopia, not North Yemen.