What is output of given program? (Output with explanation)

Question

#include<stdio.h>
#define square(x) x*x
int main()
{
printf("%d",square(4-1));
return 0;
}

Answer 1

(4-1)*(4-1)=3*3=9

Answer 2

square (4-1) = square (3) = 3*3 = 9