quiz on printf()

what is the output of the following code?

#include<stdio.h>
int main()
{
         int a,b,c;
         a=1;
         b=1;c=2;
         printf("%d %d %d %d",a,b,c);
         return 0;
}

choose one answer among the following.

1. compile error
2. compiled, but stops when run
3. 1 1 2
4.strange output
5. None