The by-election is slated to be held on November 21.
The by-poll in the prestigious seat was necessitated by the resignation of Health Minister Lal Thanzara on August 18 last.
Lal Thanzara, younger brother of state Chief Minister Lal Thanhawla, had to resign followoing opposition allegation that he held more than 21 per cent shares in a construction company which bagged crores of rupees worth road construction contract by the state government among other charges.