Polling began Friday morning for 199 Assembly seats out of the 200 in Rajasthan, a key state which the BJP is fighting to retain.
According to an official spokesperson, polling began at 8 am in all the 51,687 booths set up across the state.
The results will be out on December 11, along with those from the other four states which saw Assembly elections in the past few weeks.
Manvendra Singh switched to the Congress just before the election, making the fight tougher for Raje this time. She had won 63 per cent of the votes cast in 2013, winning the seat by a margin of 60,896.
Tonk, with a sizeable Muslim population, is a keenly-watched contest between Sachin Pilot and BJP candidate and Rajasthan Transport Minister Yoonus Khan, who is the saffron party's only Muslim face in the elections.
This is a maiden assembly election for Pilot, a two-time MP who is seen as a chief ministerial possibility if the Congress wins. He has represented Dausa and Ajmer Lok Sabha constituencies in the past.
Former chief minister Ashok Gehlot, who is also seen as a chief ministerial candidate for the Congress, is contesting from Sardarpura, a constituency he now represents.
Gehlot has been the Rajasthan chief minister twice.
In about 130 constituencies, the contest appears to be mainly between the BJP and the Congress.
In the current House, the BJP has 160 seats and the Congress 25.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)