What will be the output of the following C code?

#include <stdio.h>
int main()
{
    foo(ary);
}
void foo(int **ary)
{
    int i = 10, k = 20, j = 30;
    int *ary[2];
    ary[0] = &i;
    ary[1] = &j;
    printf("%d\n", ary[0][1]);
}

A. 10

B. 20

C. Compile time error

D. Undefined behaviour

Answer: Option D