MPSC Subordinate Services Answer Key 2021 Group B PSI STI ASO Preliminary Mains Exam Key Paper. Maharashtra Public Service Commission has conducted the written exam for Police Sub Inspector, State Tax Inspector, Assistant Section Officer positions recently. Candidate are looking for details on the Maharashtra Subordinate Services Exam Key Paper release. I have found these details at https://www.gyananetra.com/mpsc-subordinate-services-answer-key/