Consider the following languages:

L$1$: $|)$:$\}$ there exists $x,$yin${}^{***}$ such that either $\{$:xinL$(M),y!$inL$(M)\}$

$|)$:$\}$ there exists a $TM{M}^{\text{'}}$ such that for $($:$M$:$)($:$M^{\text{'}}$:$)$ and $\{$:$L(M)=L(M^{\text{'}})\}.$

Which of the above languages is Decidable?

Orily L$1$

Only $L_2$

Both