Which one of the following is relevant to non-preemptive kernels?

Non-preemptive kernels:

Non-preemptive kernels, also known as cooperative or voluntary context-switching kernels, operate in a way where a running process cannot be forcibly interrupted or preempted by the kernel until it voluntarily gives up control.

• The Non-preemptive kernels do not allow a running process in kernel mode to be interrupted or preempted until it voluntarily relinquishes control, typically by exiting the kernel mode, blocking, or yielding control of the CPU.

Here, option 3 is correct.