New Delhi, Apr 10: Opinion of the Attorney General has been sought on the constitutional validity of banning publication of results of exit polls, the Lok Sabha was informed today. Information and Broadcasting Minister Ravi Shankar Prasad stated this in a written reply to P Rajendran who wanted to know whether government has any proposal to ban the opinion polls conducted by various print and electronic media before elections. The minister said the law ministry has informed that the Election Commission has laid down guidelines for publication and dissemination of results of opinion polls/exit polls in January 1998 during general election to Lok Sabha and certain legislative assemblies in 1998-99. However, these guidelines were withdrawn by the commission in September 1999. Bureau Report