Must a 'general call' be acknowledged'?

Question

Question ATPL - Airline Transport Pilot license - IFR Communications

QuizVDS · Accepted Answer

No

QuizVDS · Answer

Yes, from all stations in the sequence they have been addressed

QuizVDS · Answer

Yes, but only from the station first called

QuizVDS · Answer

Yes, from all stations in a random sequence

Id 115 - ATPL - Must a 'general call' be acknowledged'?