Unless otherwise prescribed, what is the rule regarding level to be maintained by an aircraft flying IFR outside controlled airspace?

Question

Question ATPL - Airline Transport Pilot license - Air Law

QuizVDS · Accepted Answer

1 000 feet above the highest obstacle within 8 kilometres of the estimated position of the aircraft

QuizVDS · Answer

2 000 feet above the highest obstacle within 8 nautical miles of course

QuizVDS · Answer

1 000 feet above the highest obstacle within 8 nautical miles of course

QuizVDS · Answer

2 000 feet above the highest obstacle within 8 kilometres of course

Id 273 - ATPL - Unless otherwise prescribed, what is the rule regarding level to be maintained by an aircraft flying IFR outside controlled airspace?