Don't loose hope as 4 month is enough time to crack JEE. You need to speedup your study but don't miss conceptual part. Start PCM simultaneously. Don't waste your time in confusion just start doing the things and devote as much time as you can in studies.and give emphasis on the revision. revision is very important. I have seen many students who have cracked JEE with this much time preparation. Just be consistent with your studies.
Do D C Pandey also for physics. your planning is good.just go with it
All the best.
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