Force \Alph to Latin symbols in exam class

[avidseeker]

I have an exam written in Arabic. Need Latin numbering for choices (A, B, C, D).

MWE:

\documentclass[12pt]{exam}
            
\usepackage{polyglossia}
\usepackage{fontspec}

% Language setup
\setmainlanguage[numerals=maghrib]{arabic}
\setotherlanguage{english}
\newfontfamily\arabicfont[Script=Arabic,Scale=0.9]{Amiri}

% Questions setup
\usepackage{alphalph}
\renewcommand{\thechoice}{\AlphaAlph{\value{choice}}}

\begin{document}

\begin{questions}
    \question
        أوجد قيمة $x$ في المقدار اﻵتي:
    \begin{choices}
        \choice 1
        \choice 2
        \choice 3
        \choice 4
    \end{choices}
\end{questions}

\end{document}

Yields undefined control sequence for \choice.

Tried this, and this.