$12$ int $n1=12$

$13$ int $n2=5$;

$14$ int $n3=++n1-n2--$;

What is the result of the code above?

$n3=9$ and $n2=4$ and $n1=13$

$n3=7$ and $n2=5$ and $n1=13$

$n3=8$ and $n2=4$ and $n1=13$

compilation fails on line $14$

$n3=8$ and $n2=4$ and $n1=12$