Why conclusion 3?

Question

#include <stdio.h>
#define square(x)(x*x)
int main() {
int x, y=1;
x = square(y+1);
printf("%d", x);
return 0;
}

Answer 1

Vasiliy

x * x
= y + 1 * y + 1
= 1 + 1 * 1 + 1
= 3

Answer 2

Vasiliy

If it was (x) * (x)

Then (y + 1) * (y + 1)
= (1 + 1) * (1 + 1)
= 2 * 2
= 4

Answer 3

A͢J - S͟o͟l͟o͟H͟e͟l͟p͟e͟r͟ ☺️👍
I counted according to the second option