Hello,

If the question given in the mains examination is wrong by the National Testing Agency itself then for this question everybody will be either awarded marks or it would stand cancel.

Now there are cases to be considered that how your percentile would affect this. Initially if in the answer key ,you have scored certain marks including the answer of the wrong question which you have marked correctly in the examination but later if it would cancel then your percentile would surely decrease as you were scoring 4 marks because of that question.

But if you have not attempted that question or attempted wrong then it won't affect your percentile because that question stands cancelled . In fact if you have attempted wrong you would have got -1 for that but now your total score will increase by +1. So, your percentile will increase a bit .