I am student appeared for boards in 2012 and have cleared all the subjects But i want to improve my marks due to the recent change in IIT exam I wanted to know whether I should go for private or improvement exam I heard there is a rule to sit in all 5 subjects to be able to qualify Also I do not know hw to get improvement forms in kolkata The regional office in bhubaneshwar never picks up the phone And the last date is 15th Sept so time is very short plzzz help