Must a 'general call' be acknowledged'?

Question

ATPL - Airline Transport Pilot license - IFR Communications - Must a 'general call' be acknowledged'?

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

ATPL: Must a 'general call' be acknowledged'?