Brothers, let me tell you something. keys are wrong and even questions asked to reply for are also wrong. what the f..k can we do?
e.g.
Q.58 Railway tracks are banked on curves because: Correct Ans is to generate centripetal force. Same theory as elevated banks on road at curves.
All options given in question paper are wrong. Just goggle around or click this link.
http://www.onlinetyari.com/question-...es-i33604.html
correct answer will appear as green. This is not what I am confirming from internet but this is what I know. :-( they gave me one mark for choosing wrong answer. :-D

Real question is "They can change the answer keys but how on earth they would be able to change the question paper?