for($i = 0; $i <= $n_fragen_anz; $i++) {
	$c_frage = $frage[$i]['frage'];
	$_SESSION['c_text_frage'.$i] = $c_frage;
	$_SESSION['n_frage'.$i.'_num_antworten'] = count($frage[$i]['antwort']);
	for($j = 0; $j <= $_SESSION['n_frage'.$i.'_num_antworten']; $j++)
	{
		$c_antwort = $frage[$i]['antwort'][$j];
		if($frage[$i]['antwort'][$j]['richtig'])
		{
			$b_antwort_frage = 1;
		}
		else
		{
			$b_antwort_frage = 0;
		}
		$_SESSION['b_richtig_frage'.$i.'_antwort'.$j] = $b_antwort_frage;
		$_SESSION['c_antwort'.$j.'_frage'.$i] = $c_antwort;
	}
	echo $_SESSION['n_frage'.$i.'_num_antworten'];
}