Select the correct syntax.

if$($a$==$b$)\{$

$$alert$("$Hello World!"$)$;

$\}$ else $($a$!=$b$)\{$

$$alert$("$Good Bye World!"$)$;

$\}$

if$($a$==$b$)\{$

$$ alert$("$Hello World!"$)$;

$\}$ else $($a$!=$b$)\{$

$$ alert$("$Good Bye World!"$)$;

$\}$

if$($a$==$b$)\{$

$$ alert$("$Hello World!"$)$;

$\}$ else $\{$

$$ alert$("$Good Bye World!"$)$;

$\}$

if$($a$==$b$)\{$

$$ alert$("$Hello World!"$)$;

$\}$ else $()\{$

$$ alert$("$Good Bye World!"$)$;

$\}$