Which is the implementation of the swap function?1.void swap (int a, int b) { int temp; temp = a; a = b; b = temp; } int main () { int i = 0, j = 1; swap (i, j); } 2.void swap (int&a, int&b) { int temp; temp = a; a = b; b = temp; } int main () { int i = 0, j = 1; swap (i, j); } 3.void swap (int *a, int *b) { int *temp; temp = a; a = b; b = temp; } int main () { int i = 0, j = 1; swap (&i, &j); }

• A. 3 Only
• B. 2 Only
• C. 2 and 3 only
• D. None of the above.