Ninety-one Lok Sabha constituencies spread across 18 states and two Union Territories, including all in Andhra Pradesh and Telangana, will go to polls on Thursday in the first-phase, with Nitin Gadkari, Kiren Rijiju and VK Singh among several Union ministers in the fray. In Andhra Pradesh, Sikkim and Odisha, assembly polls to 1,75, 32 and 28 seats, respectively, will be held simultaneously in the first phase.