What is the output of the following code?

#include<stdio.h>
int get_len(char *s)
{
      int len = 0;
      while(s[len] != '\0')
        len++;
      return len;
}
int main()
{
      char *s = "lengthofstring";
      int len = get_len(s);
      printf("%d",len);
      return 0;
}

A. 14

B. 0

C. Compile time error

D. Runtime error

Answer: Option A