My dear followers my name is vivek tiwari ,I am chemistry teacher having 14 year teaching experience in field of class 12 as well sa jee and neet aspirant students, childrens. I have written a book for organic chemistry class 12th,and also for jee and neet students, which is in both Hindi and English medium. After you have read book, you will feel like a live class is running in front of you,and the price of book is very low , so I want you to purchase book for your bright future.