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>
    int *fun();
    int main()
    {
        int *ptr = fun();
        printf("%d\n", *ptr);
    }
    int *fun()
    {
        int n = 12;
        return &n;
    }

1. Segmentation fault
2. Undefined behaviour
3. Compilation Error
4. 12
5. None of these

Correct Option: A

Segmentation fault