Congress leader Rahul Gandhi on Monday led the opposition attack on the government over the exam paper leak issue in the Lok Sabha, saying there is a very serious problem in the country`s exam system and that Education Minister Dharmendra Pradhan has blamed everybody except himself for it.

Under opposition fire, Pradhan said that he was "here at the mercy of my leader, the prime minister" and that his government is collectively answerable. The minister also asserted that there has been no evidence of paper leaks in the last seven years.