Opposition parties are holding meeting in Parliament House to discuss the Presidential elections and their choice of candidate for top Constitutional post. <br/><br/>The meeting convened by Congress President Sonia Gandhi is being attended by former Prime Minister Dr Manmohan Singh, Sitaram Yechury of CPI(M), RJD Chief Lalu Prasad, Sharad Pawar of NCP, SP leader Ramgopal Yadav, BSP leader Satish Chandra Mishra, DMK leader Kanimozhi among others. <br/><br/>Earlier, cracks appeared in the opposition camp after the JD(U) decided to extend support to NDA Presidential nominee Ram Nath Kovind. The names of former Lok Sabha Speaker Meira Kumar , Prakash Ambedkar, grandson of B R Ambedkar and Gopal Krishna Gandhi are doing the rounds as opposition candidate. <br/><br/>On the other hand, NDA nominee Ram Nath Kovind will file his nomination papers at 11.30 AM tomorrow. Chief Ministers of BJP ruled states, senior leaders of NDA and others will be present on the occasion.