can u tell me some good books which i can refer for prearation of cat ?and what is the cut-off marks in cat for iipm?

First of all let be make a mention about IIPM. IIPM has been mired in controversies. Coming to CAT, if you are looking at books, you can refer the following, Reading Comprehension by Sujith Kumar, Verbal Ability by Arun Sharma, Data Sufficiency and Logical Reasoning by Arun Sharma or Nishat Sinha a