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>
    void main()
    {
        int p = 15;
        if (true);
            printf("Hey... Hellow...");
    }

1. Hey..
2. Hellow...
3. 15
4. true
5. Compilation Error

Correct Option: E

Compilation Error

main.c: In function ‘main’:
main.c:5:13: error: ‘true’ undeclared (first use in this function)
         if (true);
             ^~~~
main.c:5:13: note: each undeclared identifier is reported only once for each function it appears in