What is the maximum standard size overcurrent protective device permitted to protect the following THW conductors when they are not part of a branch circuit supplying more than one receptacle and are terminated to equipment rated $75$C$?$

$6$ AWG THWAnswer $1$Choose..$\mathrm{.}400$ A$450$ A$200$ A$70$ A$350$ A$175$ A$250$ A$2/0$ AWG THWAnswer $2$Choose..$\mathrm{.}400$ A$450$ A$200$ A$70$ A$350$ A$175$ A$250$ A$4/0$ AWG THWAnswer $3$Choose..$\mathrm{.}400$ A$450$ A$200$ A$70$ A$350$ A$175$ A$250$ A$350$ kcmil THWAnswer $4$Choose..$\mathrm{.}400$ A$450$ A$200$ A$70$ A$350$ A$175$ A$250$ A$600$ kcmil THWAnswer $5$Choose..$\mathrm{.}400$ A$450$ A$200$ A$70$ A$350$ A$175$ A$250$ A