Varanasi, Apr 24 (ANI): BJP’s prime ministerial candidate Narendra Modi arrived in Varanasi on Thursday to file his nomination for contesting elections and paid tribute to Madan Mohan Malviya. Modi is facing electoral challenges from Arvind Kejriwal of the Aam Aadmi Party, Ajai Rai of the Congress and candidates of the Bahujan Samaj Party, the Samajwadi Party and Mamata Banerjee's Trinamool Congress.