Once you download the admit card, doesn't it give you an option to affix a photograph on the admit card?  You need to affix a passport size photograph and not stamp size photograph. You do not want to be under the fear whether you will be allowed for the exam or not due to a photograph on the admit card. If you have pasted a stamp size photograph, please download the soft copy of the admit card again and affix a passport size photograph. Take atleast 2 prints of the same and keep them until the whole admission process is done with. And please carry along with you any one among your Voter Id, Aadhar Id, PAN Card, Passport, Driving License. For exam day guidelines, please visit our page at: https://bschool.careers360.com/articles/cat-admit-card