Question:
What is the output of the following code?
# define i 20
main()
{
printf("%d..",i);
fun();
printf("%d",i);
}
void fun()
{
#undef i
#define i 30
}

Option A):
Error
Option B):
0
Option C):
20..30
Option D):
20..20

Correct Answer is Option D):
20..20