What will be the output of the following C code?

#include <stdio.h>
int main()
{
    int a[4] = {1, 2, 3, 4};
    void *p = &a[1];
    void *ptr = &a[2];
    int n = 1;
    n = ptr - p;
    printf("%d\n", n);
}

A. Decision making B. Code organization C. Variable declaration D. Storing values

A. 4 B. 8 C. 2 D. 1

A. int *ptr; B. ptr int; C. int ptr; D. ptr *int;

A. Arithmetic operation B. Indirection operator C. Member access operator D. Bitwise operation