Dear rahul,

I m sorry to say that it is not possible directly reattempt class 12th exam because if your fail in Science(Biology) subject in 12th then you can reattempt Science stream but not Arts directly .If you want to take admission in Arts then you have admission in 11th first through 10th and then after passing 11th then only you can attempt 12th Arts in same board .

I hope you will understand

Thanks