https://drive.google.com/file/d/14xAkf7yQWlR6F6MfH_fJ__zVFPH6pdb/view
MS Chauhan's book is one the best book for organic chemistry and its advance problem . https://drive
https://www.google.com/search?q=advanced+problems+in+organic+chemistry+for+jee+by+ms+chauhan+pdf+solution https://drive
Here is a downloadable pdf link but you need to search on google : https://drive
but you need to verify the source and the file authenticity before using it
you can also try
