Prime Minister Narendra Modi with BJP president Amit Shah.
The results of NDTV's Bihar Exit Poll are airing tonight. Here is Prannoy Roy's analysis:
Bihar has 243 assembly seats.
To form government, an alliance needs 122 seats.
BJP has to get an additional 30 seats to go from 92 in current assembly to 122. It would need a 3.5 per cent swing in votes.
For Grand Alliance, which together holds 145 seats, they cannot lose more than 23 seats or 2 per cent swing in votes away from these parties.