sir -- i am aregular student of 12 class with biology subject and appearing 12 class in year 2010 exams here I WANT TO KNOW THAT WHILE APPEARING IN 12 CLASS WITH BIOLOGY SUBJECT COULD IT BE POSSIBLE TO APPEAR IN ANOTHER SIGLE MATHS SUBJECT . IF IT IS POSSIBLE PLEASE TELL ME THAT HOW TO APPEAR IN THAT THANKING SADIYA FARUQUI