What will happen if this C program is compiled and executed? #include<stdio.h> int main(){ return 0; }

What will happen if this C program is compiled and executed?

#include<stdio.h>
int main(){
    return 0;
}

1. a) The program will show some garbage output
2. b) There will be a compile error and the program will not execute
3. c) No output (Output screen will be empty)
4. d) There will be a run-time error