function select2 dropdown (front end)

public function ethnicity(Request $request)
{
    $ethnicity = [];

    if($request->has('q')){
        $search = $request->q;
        $ethnicity = DB::table("modified_dpprs")
                ->select("id","Bangsa_updated")
                ->where('Bangsa_updated','LIKE',"%$search%")
                ->get();
    }
    return response()->json($ethnicity);
}