i m persuing my 12th in delhi ,i want to know that is there is any rule that i

have only 2 years for after 12 th for writing iit papers inc the year in which i will

give my board exams

if so what if i m not appearing in the year which i gaved my 12th exams ,

will i lose my 1 attempt then or i will still have 2 attemptss.......

pls hlp me fast 

thnks in advnc