i gave the class 12 exam in 2013 but i got less marks in physics,chem,maths.I want to improve these three subjects.i want to gave improvement exam.is there any problm with theese marks next year in jee mains, bitsat.how many chance i got for jee.new marksheet cotain only three subject marks or all five.is there any problm in higher studies with improvement marks.how can i appear in jee and bitsat,as 12 passed or in 12 condidate.