Your rank can be predicted by using the formula, (100-your total percentile)*869010/100. In your case, your approximate rank would be 782109. In 2019, the cut off for ST Category was 44.3345172. Now cut offs change every year depending on various factors. Let's say the number of candidates for April exam increased to 12,00,000 then your final rank shall be (100 - your total score) X 12,00,000/100. Even if it is more or less the same, you will have to appear for JEE April Main session to be qualified. Please check the possibilities of colleges by using our college predictor: https://engineering.careers360.com/jee-main-college-predictor .