The fight for Bihar's 243-seat House has heated up with the National Democratic Alliance beating all poll predictions to overtake the Grand Alliance, or the Mahagathbandhan. As BJP bags more seats than the 2015 polls, and the Rashtriya Janata Dal also going strong, questions are being raised about JD(U)'s performance, and that of the Congress. What has cost the two significant parties their position? Dr Prannoy Roy discusses with experts.