Hello Abhinay !

NTSE paper comprises of 40% of Social science , so it become very important to crack Social with good marks.

For stage 1 , the state board’s textbooks for History & Civics and Geography are important.

And for stage 2 , books of NCERT Class IX & X are important.

Also ,you can see video lectures by Prof. Vipin Joshi like - “The Rise of Nationalism in Europe”, “The French Revolution”, etc.  (They will help you a lot).

Also , there is a channel NTSE Guru , you can subscribe to that . The video lectures were completely understandable. Each topic consists of a video tutorial, concept theory, practice sheets, previous year questions & tests.

Hope it helps !