L

$=$

$\{$

G

is a grammar $|$

L

$($

G

$)$

$=$

$\backslash$Sigma

$$

$\}$

L

$=$

$\{$

G

is a grammar $|$

L

$($

G

$)$

$=$

$\backslash$Sigma

$$

$\}$

Non$-$Recognizable

Decidable

Recognizable