Rajnandgaon, Nov 10 (ANI): Preparations are underway for first phase of polls to be held in 18 constituencies of Chhattisgarh on Monday. Twelve constituencies in the naxal-affected Bastar division, comprising seven districts- Kanker, Kondagaon, Bastar, Narayanpur, Bijapur, Dantewada, Sukma- and six constituencies of Rajnandgaon district will go to polls in the first phase.