Hi Saquib, 

I assume, you are refering to preparation of NEET exam. Any competitve exam adapts a pattern in which the conceptual knowledge of the candidate is tested. Thus, the goal should be to be clear with the concepts. 

Errorless, is a good objective book for physics. The book gives ample problems for a particular topic and also individually provides rich conceptual knowledge of subtopics. Solving around 300 to 500 problems per chapter will definitely ensure good understanding of the topic. For further conceptual doubts, you can refer to the Allen modules. 

Thus, solving the full book of Errorless Physics and going through Allen modules, would be more than enough. Determination is all that is needed.

All The Best