about muliple choice question solution

[kesu33]

i want to get answer key at the end of each chapter. but when i give the following code it show all the previous chapter answer at end of each chapter.

\newcommand*\getanswers{%
	\def\betweenanswers{\def\betweenanswers{\hspace{2em}}}%
	\ForEachUsedExerciseByID{%
		\betweenanswers##3\ExercisePropertyGet{##1}{##2}{answer}%
	}%
}

\newcommand*{\displaycurrentchapter}{%
	Chapter number: \thechapter \ExercisePropertyGet{type}{id}{property}
}

please help..