Q. Consider the following iterative implementation to find the length of the string:
#include< stdio.h >
int get_len(char *s){
  int len = 0;
  while(________)
   len++;
  return len;
}
int main(){
  char *s = "harsh";
  int len = get_len(s);
  printf("%d",len);
  return 0;
}
Which of the following lines should be inserted to complete the above code?

• s[len-1] != 0
• s[len+1] != 0
• )s[len] != ‘\0’
• s[len] == ‘\0’

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