Explain the code wizards 0ls

Question

Output is 0

Answer 1

C is -2 and B is assigned the negative of C so it will hold an absolute value of 2. A is assigned the negative of B (and B is 2) so A becomes -2.

A + B = (-2 + -(-2)) = (-2 + 2) = 0

Answer 2

#include<stdio.h>
#define A (-B)
#define B (-C)
#define C (-2)
int main()
{
printf("%d",A+B);
return 0;
}

Answer 3

Simple logic am not getting it