What is the output(#31)?

Question

#include <stdio.h>

int main()

{

int *ptr1, i = 10; double *ptr2, j = 1.23;

ptr1 = &i; ptr2 = &j;

*ptr1 = *ptr2;

printf("%d %d %d\n", i, sizeof (ptrl), sizeof(ptr2));

return 0;

         }

 

    References: C From Theory