Shalinisharma
No, we can’t use a whitener in CBSE board exams. As CBSE Board does not allow for this, I don’t know about the other boards but CBSE has a rule to not use correction pen in Board exams.
So while writing a paper in a Board exams make sure you don’t use whitener in the exam copy instead of it just cut the line if you do something wrong.
I don’t why there is a rule about not using it but i have heard regarding this from a teacher of mine.