Weakening/strengthening and Assumptions of Argument

I get confused while answering questions which involves analysis of argument. Is there a book from where I can practice such questions extensively? Please suggest! Thanks

I get confused while answering questions which involves analysis of argument.


Is there a book from where I can practice such questions extensively?

Please suggest!

Thanks

this thread might help you.

http://www.pagalguy.com/forums/verbal-ability/critical-reasoning-cat-2012-t-74730