What is the best book to prepare Organic Chemistry for JEE Mains and advanced?

• Theory books :
  • foreign authors :
    • Peter Sykes : concise but difficult to understand, contains many advanced mechanisms so you have to filter out.
    • Morrison and Boyd : good book that is well written and much easier to understand. if you do not have coaching then it is a good choice for primary textbook.
    • Solomon, Fryhle and Snyder : definitely worth checking the Wiley edition of this book as it has many problems along with sufficient theory.
  • indian authors :
    • OP Tandon : a good book and relevant for jee mains, but you can not solely rely on it for jee advanced.
    • RK Gupta : the theory in the book is okay, but the problems seem either too advanced or too easy. so not a good choice.
• question books :
  • you can choose any book from these :
    • Advanced Problems in Organic Chemistry for JEE – MS Chouhan
    • GRB Advanced Problems In Organic Chemistry for JEE (Main and Advanced) – Himanshu Pandey
    • FITJEE-GMP