Dropping and prepare for jee mains again or get bsc degree?

86.5% in cbse 2013. 85/360 marks in jee mains . My PLANS 1 get bsc degree from punjab univ as i expect good result there 2 improvement maths exam. i basically want tobe a professor or an enterprenaur am i planning right? or i should drop to prepere for jee mains again and do Btech