$[3\mathrm{.}2.$b$]$ What is the output of the following code?

int $x=2$;

if $)<mi\; id="EditorElement\_1882787">(</mi><mn\; id="EditorElement\_1882781">4</mn>$

$\{$

$x=x+1$

cout $<mtext\; id="EditorElement\_1882736"></mtext><mi\; id="EditorElement\_1882737">"</mi><mtext\; id="EditorElement\_1882738"></mtext><mi\; id="EditorElement\_1882730">x</mi>$ is $"$ endl;

$x$ is $4$

$x$ is $3$

$x$ is $1$

$x$ is $2$