I was passed in my 12th practical with good marks.. And now I m giving improvement exam in 2020...whether I have to give the practical exam or not?
Whether you have passed your practical exams or not, you will have to re-appear for the practical exams if you wish to give an improvement exam.
CBSE Board strictly says that " Candidate will have to appear for the practical examination irrespective of the fact whether he/she has passed in the previous examination."
If you are enrolled in another board, kindly let me know its name through comment section.