The credibility of the examination system has also come under question, they said.
The Supreme Court on Wednesday agreed to re-examine its 1998 judgment granting MPs and MLAs immunity from prosecution for taking bribe to make a speech or vote in Parliament or state legislatures.
The opposition leaders have decided to seek an apology from Prime Minister Narendra Modi for his remarks.
Asserting that his government's decision to ban instant triple talaq has boosted the overall sense of security for Muslim women, Prime Minister Narendra Modi has asked Bharatiya Janata Party leaders to reach out to them during the upcoming festival of Raksha Bandhan.
Lok Sabha Speaker Om Birla on Wednesday admitted a no-confidence motion moved by Congress MP Gaurav Gogoi against the Narendra Modi government after a head count of over 50 MPs as required under the rules.
The President congratulated the people of Jammu and Kashmir for the high voter turnout recorded in the union territory in the recent Lok Sabha elections and lauded the Election Commission for holding the world's biggest democratic exercise.