True or false?

$($a$)$ in $\{0\}$

$($b$)\{0\}$

$($c$)$ in $\{\}$

$($d$)$ in $\{\{\}\}$

$($e$)\{\{\}\}$

$($f$)\{\}$ in $\{\}$

$($g$)\{\}$ in $\{\{\}\}$

$($h$)\{\}$ in $\{,\{\}\}$

$($i$)\{\}\{\{\}\}$