VARANASI: The STF caught three members of ‘nakal mafia’ including a principal and two teachers in the role of solvers red handed in Mirzapur district during the UP Board examination on Saturday. 11,240 in cash.During interrogation they disclosed that they were engaged to solve papers by Pradeep Kumar Singh, who is the principal and centre manager of Babu Ghanshyam Intermediate College. Coverless answer sheets , photo copy of question paper, guide book and other supporting articles were recovered from them. 25,000 to 30,000 from each candidate for solving the paper, and give Rs. The STF seized five answer sheets without cover, two photo copies of question paper, a piece of solved paper, a social science guide book, a computer, three mobile pones and Rs..