What will be the output of the following C code?#include

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What will be the output of the following C code?

#include <stdio.h>
    double fun();
    int main()
    {
        fun();
        return 0;
    }
    fun()
    {
        printf("250");
        return 250;
    }

1. 250
2. Depends on compiler
3. Garbage value
4. Compilation Error
5. None of these

Correct Option: D

Compilation Error

main.c:8:5: warning: return type defaults to ‘int’ [-Wimplicit-int]
     fun()
     ^~~
main.c:8:5: error: conflicting types for ‘fun’
main.c:2:12: note: previous declaration of ‘fun’ was here
     double fun();