The correct answer to the question is option 2, Ukraine International Airlines. In January 2020, a tragic incident occurred where a passenger aircraft crashed shortly after taking off from Tehran`s Imam Khomeini airport. The crash resulted in the loss of approximately 170 lives on board the airplane.

Option 1, Qatar Airways, is incorrect as it is not the correct airline involved in this particular incident.

Option 3, Singapore Airlines, is also incorrect. Singapore Airlines was not the airline involved in the crash.

Option 4, Cathay Pacific, is also incorrect. Cathay Pacific was not the airline involved in the crash.

Therefore, the accurate response to the question is option 2, Ukraine International Airlines. It is essential to pay attention to the details given in the question to select the correct answer.