What will be the output of the following C++ code? #include int main () int n; FILE * p; char buffer [5]; p = fopen ("myfile.txt", "w+"); for ( n = 'A' ; n <= 'D' ; n++) fputc ( n, p); rewind (p); fread (buffer, 1, 5, p); fclose (p); buffer[3] = '\0'; puts (buffer); return 0;

Answer: Option B