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A deeper-than-exam-level General Science reference covering Chemistry (symbols & valency, acids/bases/salts, metals & alloys, chemical compounds) and Biology (human body systems, vitamins & diseases, hormones, cell biology, ecology) for SSC, RRB and UPSC-level preparation. Includes 25 original diagrams, UPSC static-dynamic linkage notes, and practice MCQs with answers in every chapter.