What will be the output of this program?

#$!/$bin$/$bash

global$=$"pretty good variable"

checkvar$()$

$\{$

local inside$=$"not so good variable"

echo $inside

global$=$"better variable"

echo $ global

$\}$

echo $global

checkvar

echo $global

checkvar

pretty good variable

not so good variable

better variable

better variable

not so good variable

better variable

better variable

not so good variable

better variable

better variable

not so good variable

better variable

pretty good variable

not so good variable

better variable

not so good variable

better variable

better variable

None of the above