What should N1 say after stopping passengers when "N1 to the flight deck" is heard?

The appropriate response after hearing "N1 to the flight deck" is to acknowledge the communication by stating that you are standing by. This response indicates that you have received the message and are awaiting further instructions, which is essential for maintaining clear communication within the cockpit crew and cabin crew.

Saying "Cabin to the flight deck N1 standing by" demonstrates readiness and attentiveness, which is crucial in flight operations. It ensures that the flight deck is aware that the cabin crew is prepared to proceed with any necessary communications or actions while also confirming your position and status.

Other options do not align with the standard communication protocols in aviation. For instance, expressing readiness for boarding or exiting to the flight deck might suggest actions that are not immediately relevant upon receipt of that specific communication. Additionally, confirming passenger counts is typically done during different phases of flight operations and is not the immediate action that follows that particular call to the cabin.