Consider the following function definition in 'C' language:
int f(int x, int y)
{ x = x+y; y = x-y; x=x-y; printf("%d, %d", x, y);}
If the function in the main program is called f(3, 9); If called as, what will be the output?
1
3, 9
2
12, 9
3
3, 12
4
9, 3