OPSC OCS Main Exam Date 2026 – Check Subject Code List for Written Exam at opsc.gov.in

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OPSC has released the subject code notice for the OCS Main (Written) Examination-2025 under Advt. No. 05 of 2025-26. The notice lists 75 codes for compulsory, optional and Indian Language & Literature papers. The written examination is scheduled from 29 October to 7 November 2026. Candidates should check the correct subject code before filling in their Question-cum-Answer Booklets.