Conditional Preprocessor macro expansion in C

I have a macro, SOME_MACRO. It takes an argument.

Definition of SOME_MACRO:

#define SOME_MACRO(arg) __SOME_MACRO(arg)

Further I want __SOME_MACRO(arg) to expand to "ABC" if arg is 0. And if arg is not zero, __SOME_MACRO(arg) should expand to "DEF"

Suppose I call with argument 0, that is: SOME_MACRO(0)I need to test at preprocessing time, whether the argument is zero or not.

#if <argument is zero>     // line 1#define __SOME_MACRO(arg) "ABC"#elif#define __SOME_MACRO(arg) "DEF"#endif

My question is: What should be at line 1?

Taking an example:

SOME_MACRO(2) should expand to "DEF"

SOME_MACRO(0) should expand to "ABC"

Please only give solution(s) to above problem. Do not give alternative approaches or better ways to solve the problem.