Hello Subhajit,

With 78 perentile score in the JEE Main exam, your expected rank will be around 245,821 - 275,821 and your probable category rank range will be 15200 - 16800.
It should be noted that this is the probable rank and the Overall Rank Predicted is on the basis of the expected total number of students i.e. 1150000 appearing in the JEE Mains April Session.

According to the percentile score, chances are less to get a seat in good government college.

Good Luck!