What is printed by the following C$++$ code?

int arr$[]\{1,2,4,8,16\}$;

$(*($arr $+1))++$;

cout $<<$ arr$[1]$;

A$.$

$1$

B$.$

$2$

C$.$

$3$

D$.$

$4$

E$.$

Nothing. This code won't compile.