What is the output of the following code:

void duplicate $($int & $a,$ int $b,$ int & $c)$

t $a^{***}=2$;

$b^{***}=2\mathrm{.}0$;

c$?=2$;

$)$

$1$ int $x=1,y=3,z=7$;

duplicate $(x,y,z)$;$1$

cout ;

$+$

$a.231$

$b.233$

$c.2614$

$d.261$