What will be the output of the following C code having void

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What will be the output of the following C code having void return-type function?

#include <stdio.h>
    void fun()
    {
        return 5;
    }
    void main()
    {
        int n = 4;
        n = fun();
        printf("%d", n);
    }

1. 5
2. 4
3. Compilation Error
4. Runtime Error
5. None of these

Correct Option: C

Compilation Error

main.c: In function ‘fun’:
main.c:4:16: warning: ‘return’ with a value, in function returning void
         return 5;
                ^
main.c:2:10: note: declared here
     void fun()
          ^~~
main.c: In function ‘main’:
main.c:9:11: error: void value not ignored as it ought to be
         n = fun();