Hello Dear,
You drop a year, then you have two options for study- through coaching institute or self-study. there are many good institutes they provide better education like ALLEN, BANSAL, Resonance, Akash etc.
for self-study - you need to cover up all the PCM syllabus (11th + 12th). solve previous year papers. you can get free materials from the internet.
first of all, clear your concepts and then go for papers and then solve it in one day.if you stuck then go for 2 days otherwise solve in short time period.
good luck
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