Given IPv$6$ address prefix $2001$:db$8$::$/48,$ what will be the last subnet that is created if the subnet prefix is changed to $/52?$

$2001$:db$8$:$0$:f::$/52$

$2001$:db$8$:$0$:$8000$::$/52$

$2001$:db$8$:$0$:f$000$::$/52$

$2001$:db$8$:$0$:f$00$::$/52$