Hi AnkitaAnkita,
It's not clear exactly what you're asking about. Are you asking about a particular GMAT study product/document? If so, then what is it exactly and where did you get it?
If you have NOT taken the 4 GMAC CATs, then I would advise AGAINST using any resource that includes questions from those CATs. If you have any exposure to a set of questions (even if it's just to glance over a few of them) before you see them on a FULL-LENGTH CAT, then your CAT scores can be significantly 'inflated' (likely higher than they normally would be) because you would have already seen/thought about/solved some of the specific questions in the pool BEFORE they appeared on your CAT.
GMAT assassins aren't born, they're made,
Rich