If cost is the barrier:

Here are some key features of D.K. Singh's Organic Chemistry book:

: Every problem includes a solution, making it ideal for self-assessment. Available at Wiley’s Problems in Organic Chemistry for JEE

Searching for tells us you are serious about cracking Organic Chemistry. That ambition is commendable. But remember: the "top" resource is not the file format—it’s how you use it.