MUMBAI, Dec. 27 -- The Brihanmumbai Municipal Corporation (BMC) has reduced the number of duplicate voters from over 1.1 million to 168,350, significantly bringing them down to about 15%. The sharp decline followed a technical verification exercise carried out using Election Data Extraction Software developed by the BMC's IT team. The software identified duplicate voters based on similarities in photographs, surnames or multiple entries across wards, said aadditional municipal commissioner (city) Ashwini Joshi. After the software flagged the duplicate entries ward-wise, the BMC conducted door-to-door, in-person verification. While many complied with the process and filled Annexure-A forms, indicating the ward in which they wished to exercise their franchise, 78,105 voters refused to cooperate and did not submit their preferences during the verification drive. The civic body said these voters have been given time until polling day to submit their ward preferences. Until then, their names will carry a double-asterisk mark. The highest number of duplicate voters was detected in L-ward (Kurla), K-East ward (Andheri East) and R-South ward (Kandivali East), Joshi said....