What is the value stored in arr[2][2] when the following code is executed?

#include<stdio.h>
#include<string.h>
int get_min(int a, int b)
{
      if(a < b)
        return a;
      return b;
}
int edit_distance(char *s1, char *s2)
{
      int len1,len2,i,j,min;
      len1 = strlen(s1);
      len2 = strlen(s2);
      int arr[len1 + 1][len2 + 1];
      for(i = 0;i <= len1; i++)
        arr[i][0] = i;
      for(i = 0; i <= len2; i++)
         arr[0][i] = i;
      for(i = 1; i <= len1; i++)
      {
           for(j = 1; j <= len2; j++)
           {
                 min = get_min(arr[i-1][j],arr[i][j-1]) + 1;
                 if(s1[i - 1] == s2[j - 1])
                 {
                      if(arr[i-1][j-1] < min)
                        min = arr[i-1][j-1];
                 }
                 else
                 {
                      if(arr[i-1][j-1] + 1 < min)
                        min = arr[i-1][j-1] + 1;
                 }
                 arr[i][j] = min;
           }
      }
      return arr[len1][len2];
}
int main()
{
      char s1[] = "abcd", s2[] = "defg";
      int ans = edit_distance(s1, s2);
      printf("%d",ans);
      return 0;
}

A. 1

B. 2

C. 3

D. 4

Answer: Option B