Hi Aspirant,

Considering OBC,the cutoff changes from year to year based on several factors.However on a severe analysis of past few years the minimum marks to be scored in each subject for OBC is around 10-12 and the minimum aggregate of marks should be around 110-130.However this is the marks aggregate in JEE Advanced and not Main.Keep that in mind.You need to clear main first then Advance.The minimum cutoff for clearance in OBC NCL in Main remains around 74.8 percentile as per last year.

Hope it helps!!