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At Online Free Notes (OFN), we provide informative articles on various topics and textbook solutions, answers, questions, extras, pdf of different subjects (English, Alternative English, Science, Mathematics, Social Science, FIT, Environmental Education, Bookkeeping, Hindi etc.) for class 9, class 10, class 11, and class 12 under NBSE (Nagaland Board), SEBA (Assam Board), TBSE (Tripura Board), CISCE/ISC, WBBSE/WBCHSE, and those boards following NCERT published books.