What is output?

public static void swap$($int val$1,$ int val$2)\{$

$$ int temp;

$$ temp $=$ val$1$;

$$ val$1=$ val$2$;

$$ val$2=$ temp;

$\}$

$$

public static void main$($String$[]$ args$)\{$

$$ int x;

$$ int y;

$$ x $=10$;

$$ y $=20$;

$$ swap$($x$,$ y$)$;

$$ System.out.println$($x $+","+$ y$)$;

$\}$

Question $24$Answer

a$.$

$10,20$

b$.$

$10,10$

c$.$

$20,10$

d$.$

$20,20$