Different states have difference in Stage 2 paper

NCERT messes up once again i am getting lot of complains from the students that  questions were little different from the questions papers which northern state students got. I am producing the mail received from the concerned parent 

Dear Sirs,

I watched the video NTSE-2010, STAGE - 2, MAT Part - 10 uploaded by you. In the video of MAT Part-10, I observed that the question number 74 is slightly different from the question issued to me at the centre at Chennai, Tamil Nadu.I herewith enclose the photocopy of the respective page containing question number 74. Please do the needful so that we,the students appeared are not affected by this variation. Enclosures: 1. Photocopy of pg 19 of NTSE Stage II MAT question paper issued at Chennai centre 2. Photocopy of pg 19 of NTSE Stage II MAT question paper indicating errors