b$.$

Consider the schedule R$1($x$),$ R$2($x$),$ W$3($x$),$ W$1($x$),$ R$1($y$),$ W$1($y$),$ W$3($z$),$ R$2($z$),$ W$2($y$),$ W$2($z$).$

$6$

Which of the following are correct?

Schedule is not recoverable, not cascadeless and not conflict serializable.

Schedule is recoverable, cascadeless and conflict serializable.

Schedule is recoverable, not cascadeless and not conflict serializable.

Schedule is not recoverable, cascadeless and not conflict serializable.

$20C$