My dear Tarun,
By this time you have received almost all kind of possible solutions. Are not you happy that how many peaople care for you ! By the rule of majority of msgs posted you should not leave the task unfinished. I think your decision is based on negative emotions, you are not focussing on completing it but avoidinng it due to the past failures.
Pl understand you can avoid this situation but failures can come in any other fields also.
Sitaron se aage jahan aur bhi hain, abhi ishq(CA) mein imtihan aur bhi hain
Dear pl analyse yourself and pl mind no body can do it for you, why there is failures ? Put a solid plan to eradicate the shortcomings.
Apart from academics and as per many suggestions recd indulge in other social activities of life and not solely focus on passing group like take a break, go vacating on some adventures, teach needy children etc.
Make your own notes on all 4 subjects in separate registers and understand the subject from the heart. Nothing in this world can stop you from passing the group if you have decided.
enjoy life,
cheers