A Sadhu showing his mark after casting his vote at a polling station for Lok Sabha elections in Dibrugarh on Monday. Among the 51 candidates in the five Assam constituencies, which went to poll today, are union ministers Ranee Narah and Paban Singh Ghatowar, former union minister and sitting MLA Bijoy Krishna Handique, Chief Minister Tarun Gogoi's son Gourav Gogoi and Bhupen Kumar Bora of Congress.