Badal junior faces competition from former minister and Congress candidate Hans Raj Josan even though the Akali Dal is sure of his victory by a huge margin.
In the Banur assembly seat near Chandigarh, Akali Dal Jasjit Singh 'Bunny' is pitted against Deepinder Singh Dhillon of the Congress.
Bunny's father and former Punjab cooperation minister Kanwaljit Singh, a respected Akali leader, had represented the Banur seat in Mohali district till his death in a road accident March this year.
There are a total of 21 candidates in the fray for the by-election in these three assembly seats. Counting of votes will take place Thursday.