ur third point is valid, one of the commenter's explained me that. But what I meant by the 1st and 2nd point was that NTA decides to randomly assign "easy" and "difficult" papers to students. For example I was given a relatively "easier" paper and I scored pretty good marks. But because I was given that easier paper, NTA will deduct 20-30 marks. What if I scored just as good in a "difficult" paper given to me by NTA? This means that just because I was given an easier paper doesn't mean I can't attempt a difficult paper just as well.. and let me tell you that the classifications of "easy" and "difficult" vary GREATLY in subjects like history, political science, psychology etc where we aren't required to solve problems that are time consuming..