Which function call is correct regarding the following function definition?

float MAX$($int num$1,$ int num$2)$

if $($num$1>$num$2$

return num$1$;

else return num $2$ ;

$\}$

a$.$ MAx$(x,y)$;

b$.$ add MAX x$.$y;

c$.$ float MAX $x,y$;

d$.$ int MAX;