What is the output of the program? #include int main() { extern int a; printf("%d\n", a); return 0; } int a=20;

What is the output of the program? #include int main() { extern in

1.	What is the output of the program? #include int main() { extern int a; printf("%d\n", a); return 0; } int a=20;
A.	20
B.	0
C.	Garbage Value
D.	Error
Answer» B. 0