After the death of Rashtriya Janata Dal (RJD) MP Mohammad Taslimuddin, the Araria seat fell vacant. The key contenders for the seat were RJD's Sarafaraz Alam, Taslimuddin's son, and the BJP's Pradip Singh.
The by-polls in Bihar are being seen as a litmus test for Chief Minister Nitish Kumar after he pulled out of the state's grand alliance and joined the BJP.
Since Nitish Kumar parted ways from RJD, it has been alleging that CM cheated people of Bihar. The opposition has been alleging that people had not given the mandate for this.