CBSE had uploaded answers to both the offline and online exams on April 28 and students were allowed to challenge them by paying Rs. 1,000 per question. More than 1,100 students had challenged the answers.
A team of experts had reviewed the questions for three days and agreed four questions had errors.
"We were expecting the Physics questions that we had challenged would not be taken up. In case of the Chemistry question, for which the bonus marks have been given, it is evident that the units were wrong," says RL Trikha, director FIIT JEE.
Pramod Maheshwari, director Career Point, Kota agrees, "It is very unfortunate that the Physics questions that we had challenged for the offline exam have been rejected."
However, an IIT professor said such kind of errors are human and can happen when the papers were being set on such a large scale.
"There should not be any mistake, but sometimes errors do happen."