what rank i have to do as a obc candidate to get a seat at ihm kolkata

Hi Debadry, IHM is one of the premier institutes in the field of hotel management courses and the exams conducted for the same are of all India level and highly competitive. There is no such range that can be provided over the expected rank but all I can advise you is to give your best in the exam

90+ percentile will help.

although there are some seat remain reserve for this category, but you should not think for the minimum always think for the maximum,

there is very less difference now between OBC and general candidates so you have to work hard.