multiple choice questiom

in /by

multiple choice questiom

What is the output of the program?

#include<stdio.h>_x000D_
int main()_x000D_
{_x000D_
    extern int a;_x000D_
    printf("%dn", a);_x000D_
    return 0;_x000D_
}_x000D_
int a=20;_x000D_
A. 20 B. 0
C. Garbage Value D. Error

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