Suppose I am writing first language exam on 19 March 2020.there will be different sets of papers or not.
it depends on the board. Board have complete procedure to conduct exam with a decorum. Mostly board exam have sets which will be distributed in such a way that no adjacent will have same set.
SETs have different flow of question but questions are same. It may be different too. Can't be said as it all depends on the board's decision.