With a lack of resources in the system, which of the following android processes will kill last?

Question

Android

With a lack of resources in the system, which of the following processes will android kill last, provided that none of the processes is currently displaying a UI visible to the user?
Answers: -
A process that runs three
activities - A process that runs a service and one activity - A process that doesn't have
any components running
- A process that takes up the least amount of memory
garbage, so I ask for help. Thanks in advance ;)

Answer 1

It is obvious that the second option, due to the presence of a running service.
This case is not from the final test of the Android school?