\def\wwos[#1]#2#3{% {hidden name}{case name}{scoring}
\def\AMCchoiceLabelFormat##1{\hspace{-0.3em}\CheckBox[checkboxsymbol=n,checked=false,name=irakasle\theCheckBoxCounter,width=1em,height=1em]{}{##1}\stepcounter{CheckBoxCounter}}% modification of the case with hyperref
\wrongchoice[#1]{#2}\scoring{#3}%
\def\AMCchoiceLabelFormat##1{##1}% back to normal cases (for top of pages for instance)
}