N K Premchandran (RSP) and K C Venugopal (Congress) said most questions of the mathematics paper were "very difficult" and out of syllabus, while referring to media reports that claimed that the questions were leaked in the Patna region.
While even many bright students in southern India found the questions very tough, on the other hand they were leaked in north India, Venugopal said, alleging that there was a conspiracy behind it and the HRD ministry should intervene.
Ramesh Bidhuri (BJP) blamed the UPA government, saying they have set up a system which tries to "suppress bright Indian students".
It was due to the American pressure, Bidhuri claimed, that the previous government decided to have a no-fail system of examination till Class IX.
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His comments drew protests from Congress leader Mallikarjun Kharge, who said the BJP government has been in power for close to two years but he was still blaming the previous dispensation over such issues.
"The matter deserves enquiry," he said, adding that he would refer the matter to the HRD Ministry.