???? ????? ?? ?????? ????????? ?? ???????? ??? ???? ??????? ?? ????? ????? ??? ??? ?????? ??? ?? ???? ??????? ?? ?? ?? ??? ??? ???? ???? ???? ??? ?????????? ??? ????? ??? ?? ?? ???? ????? ????? ???? ???? ??? ???? ????? ??? ?????? ???? ?? ??????? ??? ????? ???Parad get oxidises just after reacting Together with the atmospheric oxygen. So we have to