It will decide the fate of candidates of the three major political parties -- the ruling AAP, the BJP and the Congress, all of whom have exuded confidence about winning the Assembly seat reserved for the SC category.
Eight candidates are in the fray but essentially the AAP, the BJP and the Congress are locked in a triangular contest.
On August 23, polling for the bye-election for Bawana constituency, one of the largest in Delhi in terms of number of electors, saw 45 per cent voter turnout, much lower than during the 2015 Assembly elections which had recorded 61.83 polling.
Incidentally, in the Rajouri Garden bypoll, held earlier this year, the BJP wrested the seat from the AAP while a resurgent Congress had finished second.
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For Bawana bypoll, the BJP has fielded Ved Prakash who had won from the constituency in the 2015 elections as an AAP candidate.
He had resigned from Assembly membership and joined the BJP in March this year, necessitating the bypoll.
The AAP's candidate is Ram Chandra, while the Congress has placed its bet on former three-time MLA from Bawana, Surendra Kumar.
According to officials an EVM and 17 VVPAT devices had malfunctioned during polling, and were replaced without any hindrance to voting.
The officials conjectured that multiple elections taking place in the city in quick succession could be a factor for the low turnout in Bawana, adding that voter turnout is "generally low" in bypolls.