Indian Institute of Engineering Science and Technology, Shibpur, affiliation not provided to SSRN, University of Calcutta, University of Calcutta, affiliation not provided to SSRN, Central Council for Research in Homoeopathy, Central Council for Research in Homoeopathy, affiliation not provided to SSRN, Indian Institute of Engineering Science and Technology, Shibpur, affiliation not provided to SSRN and Institute of Engineering and Management, Salt Lake