Q$01.$ Assume CPU scheduling algorihm is round robin with priority and it is preemptive. Which option does not cause process P$1$ to go to ready queue if at the moment it is in running state a$)$ a timer interrupt occurs b$)$ a higher priority process enters ready queue c$)$ a higher priority process P$2$ makes an $1/0$ system call d$)$ All of three options cause P$1$ to go to ready queue