KANNIYAKUMARI: The parliamentary constituency in the southern-most part of the country, Kanniyakumari, is set to see a four-cornered fight as Congress, BJP, AIADMK and NTK are set to lock horns with each other this Lok Sabha election, and the main contest will be between sitting MP Vijay Vasanth of Congress and former union minister and BJP candidate Pon Radhakrishnan. After …