Hi there,

There are very less chances or you can say no chances of changing the answer keys by cbse,as the answer keys are always almost correct.However, if any students challenges the answer keys and cbse founds the challenge correct than they change their answer keys.but it doesn't happens usually...

Hope you got your answer...

Best of luck!!!

Regards,
Rajdeep Sinha

Almost there is no change.

If you can see a question which has biased options, then there is a possibility that you will get some difference in answer option. Chances of such thing to happen is only 0.1 %.

Almost none. The coaching institutes answer keys are very much accurate. Also, it is very unlikely that answer keys of so many institutes would be different from the official one.

Hello Krishna,
You can expect very minor change in official answer key. However, Coaching Experts try their best to make answer key error free. There are very less chances of variation in Official Answer Key and Coaching Institute's answer key.
Keep Visiting Careers360.
Good Luck.

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