Hello Aspirant,

A Das Gupta and Cengage are some of the best books for JEE with lots of multiple choice questions.

A Das Gupta has many unsolved and solved questions whereas Cengage is known for the quality of questions included in the material.

I recommend you to go with A Das Gupta first as the terminology is difficult in Cengage. Intially to learn the concept and to adapt to the techniques A Das Gupta works. To explore questions with increasing the difficulty level, you can work on Cengage later.

Thank You!