i am fail in 12th exam.(.physic chemistry and maths) and i want to give improvement exam..so can I give improvement exam of only physic , chemistry, math and english??????? i dnt want to give improvement exam of economic becz i got passed marks in that subject........so IS IT POSSIBLE TO GIVE IMPROVEMENT EXAM OF ONLY THOSE 4 SUBJECTS(phy ,chem,maths and english)????????????????????????????