Question:Which of the following function sets first n characters of a string to a given character? 

#include <stdio.h>
#include <string.h>

int main(void)
{
   char *string = "abcdefghijklmnopqrstuvwxyz";
   char letter = 'x';

   printf("string before strnset: %sn", string);
   strnset(string, letter, 13);
   printf("string after  strnset: %sn", string);

   return 0;
}